1390256720

素因数分解:

$2^4\times 5^1\times {\mathrm{17378209}}^1$

素因数の和:17378222

約数の個数: 20

約数和(自身を含む): 3232347060

約数和(自身を除く): 1842090340

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 17378209, 34756418, 69512836, 86891045, 139025672, 173782090, 278051344, 347564180, 695128360, 1390256720]

約数ペア:

[(1, 1390256720), (2, 695128360), (4, 347564180), (5, 278051344), (8, 173782090), (10, 139025672), (16, 86891045), (20, 69512836), (40, 34756418), (80, 17378209)]