21908120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{42131}}^1$

素因数の和:42155

約数の個数: 32

約数和(自身を含む): 53086320

約数和(自身を除く): 31178200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 42131, 84262, 168524, 210655, 337048, 421310, 547703, 842620, 1095406, 1685240, 2190812, 2738515, 4381624, 5477030, 10954060, 21908120]

約数ペア:

[(1, 21908120), (2, 10954060), (4, 5477030), (5, 4381624), (8, 2738515), (10, 2190812), (13, 1685240), (20, 1095406), (26, 842620), (40, 547703), (52, 421310), (65, 337048), (104, 210655), (130, 168524), (260, 84262), (520, 42131)]