21471970

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{331}}^1\times {\mathrm{499}}^1$

素因数の和:850

約数の個数: 32

約数和(自身を含む): 41832000

約数和(自身を除く): 20360030

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 331, 499, 662, 998, 1655, 2495, 3310, 4303, 4990, 6487, 8606, 12974, 21515, 32435, 43030, 64870, 165169, 330338, 825845, 1651690, 2147197, 4294394, 10735985, 21471970]

約数ペア:

[(1, 21471970), (2, 10735985), (5, 4294394), (10, 2147197), (13, 1651690), (26, 825845), (65, 330338), (130, 165169), (331, 64870), (499, 43030), (662, 32435), (998, 21515), (1655, 12974), (2495, 8606), (3310, 6487), (4303, 4990)]