257635420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1$

素因数の和:188

約数の個数: 192

約数和(自身を含む): 696729600

約数和(自身を除く): 439094180

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 29, 31, 35, 46, 58, 62, 70, 89, 92, 115, 116, 124, 140, 145, 155, 161, 178, 203, 217, 230, 290, 310, 322, 356, 406, 434, 445, 460, 580, 620, 623, 644, 667, 713, 805, 812, 868, 890, 899, 1015, 1085, 1246, 1334, 1426, 1610, 1780, 1798, 2030, 2047, 2170, 2492, 2581, 2668, 2759, 2852, 3115, 3220, 3335, 3565, 3596, 4060, 4094, 4340, 4495, 4669, 4991, 5162, 5518, 6230, 6293, 6670, 7130, 8188, 8990, 9338, 9982, 10235, 10324, 11036, 12460, 12586, 12905, 13340, 13795, 14260, 14329, 17980, 18067, 18676, 19313, 19964, 20470, 20677, 23345, 24955, 25172, 25810, 27590, 28658, 31465, 36134, 38626, 40940, 41354, 46690, 49910, 51620, 55180, 57316, 59363, 62930, 63457, 71645, 72268, 77252, 80011, 82708, 90335, 93380, 96565, 99820, 103385, 118726, 125860, 126914, 143290, 144739, 160022, 180670, 193130, 206770, 237452, 253828, 286580, 289478, 296815, 317285, 320044, 361340, 386260, 400055, 413540, 415541, 444199, 560077, 578956, 593630, 634570, 723695, 800110, 831082, 888398, 1120154, 1187260, 1269140, 1447390, 1600220, 1662164, 1776796, 1840253, 2077705, 2220995, 2240308, 2800385, 2894780, 3680506, 4155410, 4441990, 5600770, 7361012, 8310820, 8883980, 9201265, 11201540, 12881771, 18402530, 25763542, 36805060, 51527084, 64408855, 128817710, 257635420]

約数ペア:

[(1, 257635420), (2, 128817710), (4, 64408855), (5, 51527084), (7, 36805060), (10, 25763542), (14, 18402530), (20, 12881771), (23, 11201540), (28, 9201265), (29, 8883980), (31, 8310820), (35, 7361012), (46, 5600770), (58, 4441990), (62, 4155410), (70, 3680506), (89, 2894780), (92, 2800385), (115, 2240308), (116, 2220995), (124, 2077705), (140, 1840253), (145, 1776796), (155, 1662164), (161, 1600220), (178, 1447390), (203, 1269140), (217, 1187260), (230, 1120154), (290, 888398), (310, 831082), (322, 800110), (356, 723695), (406, 634570), (434, 593630), (445, 578956), (460, 560077), (580, 444199), (620, 415541), (623, 413540), (644, 400055), (667, 386260), (713, 361340), (805, 320044), (812, 317285), (868, 296815), (890, 289478), (899, 286580), (1015, 253828), (1085, 237452), (1246, 206770), (1334, 193130), (1426, 180670), (1610, 160022), (1780, 144739), (1798, 143290), (2030, 126914), (2047, 125860), (2170, 118726), (2492, 103385), (2581, 99820), (2668, 96565), (2759, 93380), (2852, 90335), (3115, 82708), (3220, 80011), (3335, 77252), (3565, 72268), (3596, 71645), (4060, 63457), (4094, 62930), (4340, 59363), (4495, 57316), (4669, 55180), (4991, 51620), (5162, 49910), (5518, 46690), (6230, 41354), (6293, 40940), (6670, 38626), (7130, 36134), (8188, 31465), (8990, 28658), (9338, 27590), (9982, 25810), (10235, 25172), (10324, 24955), (11036, 23345), (12460, 20677), (12586, 20470), (12905, 19964), (13340, 19313), (13795, 18676), (14260, 18067), (14329, 17980)]