81472640

素因数分解:

$2^7\times 5^1\times {\mathrm{127301}}^1$

素因数の和:127320

約数の個数: 32

約数和(自身を含む): 194772060

約数和(自身を除く): 113299420

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127301, 254602, 509204, 636505, 1018408, 1273010, 2036816, 2546020, 4073632, 5092040, 8147264, 10184080, 16294528, 20368160, 40736320, 81472640]

約数ペア:

[(1, 81472640), (2, 40736320), (4, 20368160), (5, 16294528), (8, 10184080), (10, 8147264), (16, 5092040), (20, 4073632), (32, 2546020), (40, 2036816), (64, 1273010), (80, 1018408), (128, 636505), (160, 509204), (320, 254602), (640, 127301)]