128807960

素因数分解:

$2^3\times 5^1\times {\mathrm{269}}^1\times {\mathrm{11971}}^1$

素因数の和:12251

約数の個数: 32

約数和(自身を含む): 290919600

約数和(自身を除く): 162111640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 269, 538, 1076, 1345, 2152, 2690, 5380, 10760, 11971, 23942, 47884, 59855, 95768, 119710, 239420, 478840, 3220199, 6440398, 12880796, 16100995, 25761592, 32201990, 64403980, 128807960]

約数ペア:

[(1, 128807960), (2, 64403980), (4, 32201990), (5, 25761592), (8, 16100995), (10, 12880796), (20, 6440398), (40, 3220199), (269, 478840), (538, 239420), (1076, 119710), (1345, 95768), (2152, 59855), (2690, 47884), (5380, 23942), (10760, 11971)]