21731000

素因数分解:

$2^3\times 5^3\times {\mathrm{31}}^1\times {\mathrm{701}}^1$

素因数の和:753

約数の個数: 64

約数和(自身を含む): 52565760

約数和(自身を除く): 30834760

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 31, 40, 50, 62, 100, 124, 125, 155, 200, 248, 250, 310, 500, 620, 701, 775, 1000, 1240, 1402, 1550, 2804, 3100, 3505, 3875, 5608, 6200, 7010, 7750, 14020, 15500, 17525, 21731, 28040, 31000, 35050, 43462, 70100, 86924, 87625, 108655, 140200, 173848, 175250, 217310, 350500, 434620, 543275, 701000, 869240, 1086550, 2173100, 2716375, 4346200, 5432750, 10865500, 21731000]

約数ペア:

[(1, 21731000), (2, 10865500), (4, 5432750), (5, 4346200), (8, 2716375), (10, 2173100), (20, 1086550), (25, 869240), (31, 701000), (40, 543275), (50, 434620), (62, 350500), (100, 217310), (124, 175250), (125, 173848), (155, 140200), (200, 108655), (248, 87625), (250, 86924), (310, 70100), (500, 43462), (620, 35050), (701, 31000), (775, 28040), (1000, 21731), (1240, 17525), (1402, 15500), (1550, 14020), (2804, 7750), (3100, 7010), (3505, 6200), (3875, 5608)]