1266640

素因数分解:

$2^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{223}}^1$

素因数の和:307

約数の個数: 40

約数和(自身を含む): 2999808

約数和(自身を除く): 1733168

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 71, 80, 142, 223, 284, 355, 446, 568, 710, 892, 1115, 1136, 1420, 1784, 2230, 2840, 3568, 4460, 5680, 8920, 15833, 17840, 31666, 63332, 79165, 126664, 158330, 253328, 316660, 633320, 1266640]

約数ペア:

[(1, 1266640), (2, 633320), (4, 316660), (5, 253328), (8, 158330), (10, 126664), (16, 79165), (20, 63332), (40, 31666), (71, 17840), (80, 15833), (142, 8920), (223, 5680), (284, 4460), (355, 3568), (446, 2840), (568, 2230), (710, 1784), (892, 1420), (1115, 1136)]