18506215

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{457}}^1$

素因数の和:571

約数の個数: 32

約数和(自身を含む): 27699840

約数和(自身を除く): 9193625

約数列:

[1, 5, 7, 13, 35, 65, 89, 91, 445, 455, 457, 623, 1157, 2285, 3115, 3199, 5785, 5941, 8099, 15995, 29705, 40495, 40673, 41587, 203365, 207935, 284711, 528749, 1423555, 2643745, 3701243, 18506215]

約数ペア:

[(1, 18506215), (5, 3701243), (7, 2643745), (13, 1423555), (35, 528749), (65, 284711), (89, 207935), (91, 203365), (445, 41587), (455, 40673), (457, 40495), (623, 29705), (1157, 15995), (2285, 8099), (3115, 5941), (3199, 5785)]