644006380

素因数分解:

$2^2\times 5^1\times {\mathrm{1613}}^1\times {\mathrm{19963}}^1$

素因数の和:21585

約数の個数: 24

約数和(自身を含む): 1353319632

約数和(自身を除く): 709313252

約数列:

[1, 2, 4, 5, 10, 20, 1613, 3226, 6452, 8065, 16130, 19963, 32260, 39926, 79852, 99815, 199630, 399260, 32200319, 64400638, 128801276, 161001595, 322003190, 644006380]

約数ペア:

[(1, 644006380), (2, 322003190), (4, 161001595), (5, 128801276), (10, 64400638), (20, 32200319), (1613, 399260), (3226, 199630), (6452, 99815), (8065, 79852), (16130, 39926), (19963, 32260)]