20541100

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{281}}^1$

素因数の和:355

約数の個数: 72

約数和(自身を含む): 48465648

約数和(自身を除く): 27924548

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 43, 50, 68, 85, 86, 100, 170, 172, 215, 281, 340, 425, 430, 562, 731, 850, 860, 1075, 1124, 1405, 1462, 1700, 2150, 2810, 2924, 3655, 4300, 4777, 5620, 7025, 7310, 9554, 12083, 14050, 14620, 18275, 19108, 23885, 24166, 28100, 36550, 47770, 48332, 60415, 73100, 95540, 119425, 120830, 205411, 238850, 241660, 302075, 410822, 477700, 604150, 821644, 1027055, 1208300, 2054110, 4108220, 5135275, 10270550, 20541100]

約数ペア:

[(1, 20541100), (2, 10270550), (4, 5135275), (5, 4108220), (10, 2054110), (17, 1208300), (20, 1027055), (25, 821644), (34, 604150), (43, 477700), (50, 410822), (68, 302075), (85, 241660), (86, 238850), (100, 205411), (170, 120830), (172, 119425), (215, 95540), (281, 73100), (340, 60415), (425, 48332), (430, 47770), (562, 36550), (731, 28100), (850, 24166), (860, 23885), (1075, 19108), (1124, 18275), (1405, 14620), (1462, 14050), (1700, 12083), (2150, 9554), (2810, 7310), (2924, 7025), (3655, 5620), (4300, 4777)]