20781149150

素因数分解:

$2^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{643}}^1\times {\mathrm{719}}^1$

素因数の和:1434

約数の個数: 96

約数和(自身を含む): 41397350400

約数和(自身を除く): 20616201250

約数列:

[1, 2, 5, 10, 25, 29, 31, 50, 58, 62, 145, 155, 290, 310, 643, 719, 725, 775, 899, 1286, 1438, 1450, 1550, 1798, 3215, 3595, 4495, 6430, 7190, 8990, 16075, 17975, 18647, 19933, 20851, 22289, 22475, 32150, 35950, 37294, 39866, 41702, 44578, 44950, 93235, 99665, 104255, 111445, 186470, 199330, 208510, 222890, 462317, 466175, 498325, 521275, 557225, 578057, 646381, 924634, 932350, 996650, 1042550, 1114450, 1156114, 1292762, 2311585, 2890285, 3231905, 4623170, 5780570, 6463810, 11557925, 13407193, 14331827, 14451425, 16159525, 23115850, 26814386, 28663654, 28902850, 32319050, 67035965, 71659135, 134071930, 143318270, 335179825, 358295675, 415622983, 670359650, 716591350, 831245966, 2078114915, 4156229830, 10390574575, 20781149150]

約数ペア:

[(1, 20781149150), (2, 10390574575), (5, 4156229830), (10, 2078114915), (25, 831245966), (29, 716591350), (31, 670359650), (50, 415622983), (58, 358295675), (62, 335179825), (145, 143318270), (155, 134071930), (290, 71659135), (310, 67035965), (643, 32319050), (719, 28902850), (725, 28663654), (775, 26814386), (899, 23115850), (1286, 16159525), (1438, 14451425), (1450, 14331827), (1550, 13407193), (1798, 11557925), (3215, 6463810), (3595, 5780570), (4495, 4623170), (6430, 3231905), (7190, 2890285), (8990, 2311585), (16075, 1292762), (17975, 1156114), (18647, 1114450), (19933, 1042550), (20851, 996650), (22289, 932350), (22475, 924634), (32150, 646381), (35950, 578057), (37294, 557225), (39866, 521275), (41702, 498325), (44578, 466175), (44950, 462317), (93235, 222890), (99665, 208510), (104255, 199330), (111445, 186470)]