19780020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:214

約数の個数: 144

約数和(自身を含む): 66044160

約数和(自身を除く): 46264140

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 79, 90, 107, 117, 130, 156, 158, 180, 195, 214, 234, 237, 260, 316, 321, 390, 395, 428, 468, 474, 535, 585, 642, 711, 780, 790, 948, 963, 1027, 1070, 1170, 1185, 1284, 1391, 1422, 1580, 1605, 1926, 2054, 2140, 2340, 2370, 2782, 2844, 3081, 3210, 3555, 3852, 4108, 4173, 4740, 4815, 5135, 5564, 6162, 6420, 6955, 7110, 8346, 8453, 9243, 9630, 10270, 12324, 12519, 13910, 14220, 15405, 16692, 16906, 18486, 19260, 20540, 20865, 25038, 25359, 27820, 30810, 33812, 36972, 41730, 42265, 46215, 50076, 50718, 61620, 62595, 76077, 83460, 84530, 92430, 101436, 109889, 125190, 126795, 152154, 169060, 184860, 219778, 250380, 253590, 304308, 329667, 380385, 439556, 507180, 549445, 659334, 760770, 989001, 1098890, 1318668, 1521540, 1648335, 1978002, 2197780, 3296670, 3956004, 4945005, 6593340, 9890010, 19780020]

約数ペア:

[(1, 19780020), (2, 9890010), (3, 6593340), (4, 4945005), (5, 3956004), (6, 3296670), (9, 2197780), (10, 1978002), (12, 1648335), (13, 1521540), (15, 1318668), (18, 1098890), (20, 989001), (26, 760770), (30, 659334), (36, 549445), (39, 507180), (45, 439556), (52, 380385), (60, 329667), (65, 304308), (78, 253590), (79, 250380), (90, 219778), (107, 184860), (117, 169060), (130, 152154), (156, 126795), (158, 125190), (180, 109889), (195, 101436), (214, 92430), (234, 84530), (237, 83460), (260, 76077), (316, 62595), (321, 61620), (390, 50718), (395, 50076), (428, 46215), (468, 42265), (474, 41730), (535, 36972), (585, 33812), (642, 30810), (711, 27820), (780, 25359), (790, 25038), (948, 20865), (963, 20540), (1027, 19260), (1070, 18486), (1170, 16906), (1185, 16692), (1284, 15405), (1391, 14220), (1422, 13910), (1580, 12519), (1605, 12324), (1926, 10270), (2054, 9630), (2140, 9243), (2340, 8453), (2370, 8346), (2782, 7110), (2844, 6955), (3081, 6420), (3210, 6162), (3555, 5564), (3852, 5135), (4108, 4815), (4173, 4740)]