19951000

素因数分解:

$2^3\times 5^3\times {\mathrm{71}}^1\times {\mathrm{281}}^1$

素因数の和:373

約数の個数: 64

約数和(自身を含む): 47511360

約数和(自身を除く): 27560360

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 71, 100, 125, 142, 200, 250, 281, 284, 355, 500, 562, 568, 710, 1000, 1124, 1405, 1420, 1775, 2248, 2810, 2840, 3550, 5620, 7025, 7100, 8875, 11240, 14050, 14200, 17750, 19951, 28100, 35125, 35500, 39902, 56200, 70250, 71000, 79804, 99755, 140500, 159608, 199510, 281000, 399020, 498775, 798040, 997550, 1995100, 2493875, 3990200, 4987750, 9975500, 19951000]

約数ペア:

[(1, 19951000), (2, 9975500), (4, 4987750), (5, 3990200), (8, 2493875), (10, 1995100), (20, 997550), (25, 798040), (40, 498775), (50, 399020), (71, 281000), (100, 199510), (125, 159608), (142, 140500), (200, 99755), (250, 79804), (281, 71000), (284, 70250), (355, 56200), (500, 39902), (562, 35500), (568, 35125), (710, 28100), (1000, 19951), (1124, 17750), (1405, 14200), (1420, 14050), (1775, 11240), (2248, 8875), (2810, 7100), (2840, 7025), (3550, 5620)]