20345680

素因数分解:

$2^4\times 5^1\times {\mathrm{263}}^1\times {\mathrm{967}}^1$

素因数の和:1243

約数の個数: 40

約数和(自身を含む): 47532672

約数和(自身を除く): 27186992

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 263, 526, 967, 1052, 1315, 1934, 2104, 2630, 3868, 4208, 4835, 5260, 7736, 9670, 10520, 15472, 19340, 21040, 38680, 77360, 254321, 508642, 1017284, 1271605, 2034568, 2543210, 4069136, 5086420, 10172840, 20345680]

約数ペア:

[(1, 20345680), (2, 10172840), (4, 5086420), (5, 4069136), (8, 2543210), (10, 2034568), (16, 1271605), (20, 1017284), (40, 508642), (80, 254321), (263, 77360), (526, 38680), (967, 21040), (1052, 19340), (1315, 15472), (1934, 10520), (2104, 9670), (2630, 7736), (3868, 5260), (4208, 4835)]