21256390

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{191}}^1\times {\mathrm{359}}^1$

素因数の和:588

約数の個数: 32

約数和(自身を含む): 39813120

約数和(自身を除く): 18556730

約数列:

[1, 2, 5, 10, 31, 62, 155, 191, 310, 359, 382, 718, 955, 1795, 1910, 3590, 5921, 11129, 11842, 22258, 29605, 55645, 59210, 68569, 111290, 137138, 342845, 685690, 2125639, 4251278, 10628195, 21256390]

約数ペア:

[(1, 21256390), (2, 10628195), (5, 4251278), (10, 2125639), (31, 685690), (62, 342845), (155, 137138), (191, 111290), (310, 68569), (359, 59210), (382, 55645), (718, 29605), (955, 22258), (1795, 11842), (1910, 11129), (3590, 5921)]