72541640

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{2803}}^1$

素因数の和:3461

約数の個数: 32

約数和(自身を含む): 163529280

約数和(自身を除く): 90987640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 1294, 2588, 2803, 3235, 5176, 5606, 6470, 11212, 12940, 14015, 22424, 25880, 28030, 56060, 112120, 1813541, 3627082, 7254164, 9067705, 14508328, 18135410, 36270820, 72541640]

約数ペア:

[(1, 72541640), (2, 36270820), (4, 18135410), (5, 14508328), (8, 9067705), (10, 7254164), (20, 3627082), (40, 1813541), (647, 112120), (1294, 56060), (2588, 28030), (2803, 25880), (3235, 22424), (5176, 14015), (5606, 12940), (6470, 11212)]