18959840

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1669}}^1$

素因数の和:1755

約数の個数: 48

約数和(自身を含む): 45450720

約数和(自身を除く): 26490880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 142, 160, 284, 355, 568, 710, 1136, 1420, 1669, 2272, 2840, 3338, 5680, 6676, 8345, 11360, 13352, 16690, 26704, 33380, 53408, 66760, 118499, 133520, 236998, 267040, 473996, 592495, 947992, 1184990, 1895984, 2369980, 3791968, 4739960, 9479920, 18959840]

約数ペア:

[(1, 18959840), (2, 9479920), (4, 4739960), (5, 3791968), (8, 2369980), (10, 1895984), (16, 1184990), (20, 947992), (32, 592495), (40, 473996), (71, 267040), (80, 236998), (142, 133520), (160, 118499), (284, 66760), (355, 53408), (568, 33380), (710, 26704), (1136, 16690), (1420, 13352), (1669, 11360), (2272, 8345), (2840, 6676), (3338, 5680)]