19687880

素因数分解:

$2^3\times 5^1\times {\mathrm{331}}^1\times {\mathrm{1487}}^1$

素因数の和:1829

約数の個数: 32

約数和(自身を含む): 44461440

約数和(自身を除く): 24773560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 331, 662, 1324, 1487, 1655, 2648, 2974, 3310, 5948, 6620, 7435, 11896, 13240, 14870, 29740, 59480, 492197, 984394, 1968788, 2460985, 3937576, 4921970, 9843940, 19687880]

約数ペア:

[(1, 19687880), (2, 9843940), (4, 4921970), (5, 3937576), (8, 2460985), (10, 1968788), (20, 984394), (40, 492197), (331, 59480), (662, 29740), (1324, 14870), (1487, 13240), (1655, 11896), (2648, 7435), (2974, 6620), (3310, 5948)]