81631365

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{2039}}^1$

素因数の和:2221

約数の個数: 32

約数和(自身を含む): 139242240

約数和(自身を除く): 57610875

約数列:

[1, 3, 5, 15, 17, 51, 85, 157, 255, 471, 785, 2039, 2355, 2669, 6117, 8007, 10195, 13345, 30585, 34663, 40035, 103989, 173315, 320123, 519945, 960369, 1600615, 4801845, 5442091, 16326273, 27210455, 81631365]

約数ペア:

[(1, 81631365), (3, 27210455), (5, 16326273), (15, 5442091), (17, 4801845), (51, 1600615), (85, 960369), (157, 519945), (255, 320123), (471, 173315), (785, 103989), (2039, 40035), (2355, 34663), (2669, 30585), (6117, 13345), (8007, 10195)]