81551665

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{431}}^1$

素因数の和:561

約数の個数: 32

約数和(自身を含む): 109734912

約数和(自身を除く): 28183247

約数列:

[1, 5, 13, 41, 65, 71, 205, 355, 431, 533, 923, 2155, 2665, 2911, 4615, 5603, 14555, 17671, 28015, 30601, 37843, 88355, 153005, 189215, 229723, 397813, 1148615, 1254641, 1989065, 6273205, 16310333, 81551665]

約数ペア:

[(1, 81551665), (5, 16310333), (13, 6273205), (41, 1989065), (65, 1254641), (71, 1148615), (205, 397813), (355, 229723), (431, 189215), (533, 153005), (923, 88355), (2155, 37843), (2665, 30601), (2911, 28015), (4615, 17671), (5603, 14555)]