179999955

素因数分解:

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

素因数の和:2065

約数の個数: 64

約数和(自身を含む): 345600000

約数和(自身を除く): 165600045

約数列:

[1, 3, 5, 9, 15, 23, 27, 29, 45, 69, 87, 115, 135, 145, 207, 261, 345, 435, 621, 667, 783, 1035, 1305, 1999, 2001, 3105, 3335, 3915, 5997, 6003, 9995, 10005, 17991, 18009, 29985, 30015, 45977, 53973, 57971, 89955, 90045, 137931, 173913, 229885, 269865, 289855, 413793, 521739, 689655, 869565, 1241379, 1333333, 1565217, 2068965, 2608695, 3999999, 6206895, 6666665, 7826085, 11999997, 19999995, 35999991, 59999985, 179999955]

約数ペア:

[(1, 179999955), (3, 59999985), (5, 35999991), (9, 19999995), (15, 11999997), (23, 7826085), (27, 6666665), (29, 6206895), (45, 3999999), (69, 2608695), (87, 2068965), (115, 1565217), (135, 1333333), (145, 1241379), (207, 869565), (261, 689655), (345, 521739), (435, 413793), (621, 289855), (667, 269865), (783, 229885), (1035, 173913), (1305, 137931), (1999, 90045), (2001, 89955), (3105, 57971), (3335, 53973), (3915, 45977), (5997, 30015), (6003, 29985), (9995, 18009), (10005, 17991)]