80431640

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1\times {\mathrm{223}}^1$

素因数の和:432

約数の個数: 64

約数和(自身を含む): 185794560

約数和(自身を除く): 105362920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 127, 142, 223, 254, 284, 355, 446, 508, 568, 635, 710, 892, 1016, 1115, 1270, 1420, 1784, 2230, 2540, 2840, 4460, 5080, 8920, 9017, 15833, 18034, 28321, 31666, 36068, 45085, 56642, 63332, 72136, 79165, 90170, 113284, 126664, 141605, 158330, 180340, 226568, 283210, 316660, 360680, 566420, 633320, 1132840, 2010791, 4021582, 8043164, 10053955, 16086328, 20107910, 40215820, 80431640]

約数ペア:

[(1, 80431640), (2, 40215820), (4, 20107910), (5, 16086328), (8, 10053955), (10, 8043164), (20, 4021582), (40, 2010791), (71, 1132840), (127, 633320), (142, 566420), (223, 360680), (254, 316660), (284, 283210), (355, 226568), (446, 180340), (508, 158330), (568, 141605), (635, 126664), (710, 113284), (892, 90170), (1016, 79165), (1115, 72136), (1270, 63332), (1420, 56642), (1784, 45085), (2230, 36068), (2540, 31666), (2840, 28321), (4460, 18034), (5080, 15833), (8920, 9017)]