21000643250

素因数分解:

$2^1\times 5^3\times {\mathrm{197}}^1\times {\mathrm{653}}^2$

素因数の和:1520

約数の個数: 48

約数和(自身を含む): 39573365832

約数和(自身を除く): 18572722582

約数列:

[1, 2, 5, 10, 25, 50, 125, 197, 250, 394, 653, 985, 1306, 1970, 3265, 4925, 6530, 9850, 16325, 24625, 32650, 49250, 81625, 128641, 163250, 257282, 426409, 643205, 852818, 1286410, 2132045, 3216025, 4264090, 6432050, 10660225, 16080125, 21320450, 32160250, 53301125, 84002573, 106602250, 168005146, 420012865, 840025730, 2100064325, 4200128650, 10500321625, 21000643250]

約数ペア:

[(1, 21000643250), (2, 10500321625), (5, 4200128650), (10, 2100064325), (25, 840025730), (50, 420012865), (125, 168005146), (197, 106602250), (250, 84002573), (394, 53301125), (653, 32160250), (985, 21320450), (1306, 16080125), (1970, 10660225), (3265, 6432050), (4925, 4264090), (6530, 3216025), (9850, 2132045), (16325, 1286410), (24625, 852818), (32650, 643205), (49250, 426409), (81625, 257282), (128641, 163250)]