21926060

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^3\times {\mathrm{499}}^1$

素因数の和:547

約数の個数: 48

約数和(自身を含む): 49980000

約数和(自身を除く): 28053940

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 499, 676, 845, 998, 1690, 1996, 2197, 2495, 3380, 4394, 4990, 6487, 8788, 9980, 10985, 12974, 21970, 25948, 32435, 43940, 64870, 84331, 129740, 168662, 337324, 421655, 843310, 1096303, 1686620, 2192606, 4385212, 5481515, 10963030, 21926060]

約数ペア:

[(1, 21926060), (2, 10963030), (4, 5481515), (5, 4385212), (10, 2192606), (13, 1686620), (20, 1096303), (26, 843310), (52, 421655), (65, 337324), (130, 168662), (169, 129740), (260, 84331), (338, 64870), (499, 43940), (676, 32435), (845, 25948), (998, 21970), (1690, 12974), (1996, 10985), (2197, 9980), (2495, 8788), (3380, 6487), (4394, 4990)]