99999975

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{1999}}^1$

素因数の和:2064

約数の個数: 48

約数和(自身を含む): 178560000

約数和(自身を除く): 78560025

約数列:

[1, 3, 5, 15, 23, 25, 29, 69, 75, 87, 115, 145, 345, 435, 575, 667, 725, 1725, 1999, 2001, 2175, 3335, 5997, 9995, 10005, 16675, 29985, 45977, 49975, 50025, 57971, 137931, 149925, 173913, 229885, 289855, 689655, 869565, 1149425, 1333333, 1449275, 3448275, 3999999, 4347825, 6666665, 19999995, 33333325, 99999975]

約数ペア:

[(1, 99999975), (3, 33333325), (5, 19999995), (15, 6666665), (23, 4347825), (25, 3999999), (29, 3448275), (69, 1449275), (75, 1333333), (87, 1149425), (115, 869565), (145, 689655), (345, 289855), (435, 229885), (575, 173913), (667, 149925), (725, 137931), (1725, 57971), (1999, 50025), (2001, 49975), (2175, 45977), (3335, 29985), (5997, 16675), (9995, 10005)]