19961720

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6317}}^1$

素因数の和:6407

約数の個数: 32

約数和(自身を含む): 45489600

約数和(自身を除く): 25527880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6317, 12634, 25268, 31585, 50536, 63170, 126340, 252680, 499043, 998086, 1996172, 2495215, 3992344, 4990430, 9980860, 19961720]

約数ペア:

[(1, 19961720), (2, 9980860), (4, 4990430), (5, 3992344), (8, 2495215), (10, 1996172), (20, 998086), (40, 499043), (79, 252680), (158, 126340), (316, 63170), (395, 50536), (632, 31585), (790, 25268), (1580, 12634), (3160, 6317)]