18275860

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{269}}^1$

素因数の和:400

約数の個数: 48

約数和(自身を含む): 39916800

約数和(自身を除く): 21640940

約数列:

[1, 2, 4, 5, 10, 20, 43, 79, 86, 158, 172, 215, 269, 316, 395, 430, 538, 790, 860, 1076, 1345, 1580, 2690, 3397, 5380, 6794, 11567, 13588, 16985, 21251, 23134, 33970, 42502, 46268, 57835, 67940, 85004, 106255, 115670, 212510, 231340, 425020, 913793, 1827586, 3655172, 4568965, 9137930, 18275860]

約数ペア:

[(1, 18275860), (2, 9137930), (4, 4568965), (5, 3655172), (10, 1827586), (20, 913793), (43, 425020), (79, 231340), (86, 212510), (158, 115670), (172, 106255), (215, 85004), (269, 67940), (316, 57835), (395, 46268), (430, 42502), (538, 33970), (790, 23134), (860, 21251), (1076, 16985), (1345, 13588), (1580, 11567), (2690, 6794), (3397, 5380)]