21820550

素因数分解:

$2^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{223}}^1$

素因数の和:357

約数の個数: 48

約数和(自身を含む): 43330560

約数和(自身を除く): 21510010

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 95, 103, 190, 206, 223, 446, 475, 515, 950, 1030, 1115, 1957, 2230, 2575, 3914, 4237, 5150, 5575, 8474, 9785, 11150, 19570, 21185, 22969, 42370, 45938, 48925, 97850, 105925, 114845, 211850, 229690, 436411, 574225, 872822, 1148450, 2182055, 4364110, 10910275, 21820550]

約数ペア:

[(1, 21820550), (2, 10910275), (5, 4364110), (10, 2182055), (19, 1148450), (25, 872822), (38, 574225), (50, 436411), (95, 229690), (103, 211850), (190, 114845), (206, 105925), (223, 97850), (446, 48925), (475, 45938), (515, 42370), (950, 22969), (1030, 21185), (1115, 19570), (1957, 11150), (2230, 9785), (2575, 8474), (3914, 5575), (4237, 5150)]