21076665

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{797}}^1$

素因数の和:889

約数の個数: 32

約数和(自身を含む): 35392896

約数和(自身を除く): 14316231

約数列:

[1, 3, 5, 15, 41, 43, 123, 129, 205, 215, 615, 645, 797, 1763, 2391, 3985, 5289, 8815, 11955, 26445, 32677, 34271, 98031, 102813, 163385, 171355, 490155, 514065, 1405111, 4215333, 7025555, 21076665]

約数ペア:

[(1, 21076665), (3, 7025555), (5, 4215333), (15, 1405111), (41, 514065), (43, 490155), (123, 171355), (129, 163385), (205, 102813), (215, 98031), (615, 34271), (645, 32677), (797, 26445), (1763, 11955), (2391, 8815), (3985, 5289)]