64999040

素因数分解:

$2^7\times 5^1\times {\mathrm{101561}}^1$

素因数の和:101580

約数の個数: 32

約数和(自身を含む): 155389860

約数和(自身を除く): 90390820

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 101561, 203122, 406244, 507805, 812488, 1015610, 1624976, 2031220, 3249952, 4062440, 6499904, 8124880, 12999808, 16249760, 32499520, 64999040]

約数ペア:

[(1, 64999040), (2, 32499520), (4, 16249760), (5, 12999808), (8, 8124880), (10, 6499904), (16, 4062440), (20, 3249952), (32, 2031220), (40, 1624976), (64, 1015610), (80, 812488), (128, 507805), (160, 406244), (320, 203122), (640, 101561)]