31918120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61381}}^1$

素因数の和:61405

約数の個数: 32

約数和(自身を含む): 77341320

約数和(自身を除く): 45423200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 61381, 122762, 245524, 306905, 491048, 613810, 797953, 1227620, 1595906, 2455240, 3191812, 3989765, 6383624, 7979530, 15959060, 31918120]

約数ペア:

[(1, 31918120), (2, 15959060), (4, 7979530), (5, 6383624), (8, 3989765), (10, 3191812), (13, 2455240), (20, 1595906), (26, 1227620), (40, 797953), (52, 613810), (65, 491048), (104, 306905), (130, 245524), (260, 122762), (520, 61381)]