12721765

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{107}}^1$

素因数の和:241

約数の個数: 32

約数和(自身を含む): 18247680

約数和(自身を除く): 5525915

約数列:

[1, 5, 7, 35, 43, 79, 107, 215, 301, 395, 535, 553, 749, 1505, 2765, 3397, 3745, 4601, 8453, 16985, 23005, 23779, 32207, 42265, 59171, 118895, 161035, 295855, 363479, 1817395, 2544353, 12721765]

約数ペア:

[(1, 12721765), (5, 2544353), (7, 1817395), (35, 363479), (43, 295855), (79, 161035), (107, 118895), (215, 59171), (301, 42265), (395, 32207), (535, 23779), (553, 23005), (749, 16985), (1505, 8453), (2765, 4601), (3397, 3745)]