39999990

素因数分解:

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

素因数の和:2061

約数の個数: 64

約数和(自身を含む): 103680000

約数和(自身を除く): 63680010

約数列:

[1, 2, 3, 5, 6, 10, 15, 23, 29, 30, 46, 58, 69, 87, 115, 138, 145, 174, 230, 290, 345, 435, 667, 690, 870, 1334, 1999, 2001, 3335, 3998, 4002, 5997, 6670, 9995, 10005, 11994, 19990, 20010, 29985, 45977, 57971, 59970, 91954, 115942, 137931, 173913, 229885, 275862, 289855, 347826, 459770, 579710, 689655, 869565, 1333333, 1379310, 1739130, 2666666, 3999999, 6666665, 7999998, 13333330, 19999995, 39999990]

約数ペア:

[(1, 39999990), (2, 19999995), (3, 13333330), (5, 7999998), (6, 6666665), (10, 3999999), (15, 2666666), (23, 1739130), (29, 1379310), (30, 1333333), (46, 869565), (58, 689655), (69, 579710), (87, 459770), (115, 347826), (138, 289855), (145, 275862), (174, 229885), (230, 173913), (290, 137931), (345, 115942), (435, 91954), (667, 59970), (690, 57971), (870, 45977), (1334, 29985), (1999, 20010), (2001, 19990), (3335, 11994), (3998, 10005), (4002, 9995), (5997, 6670)]