28878280

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{6389}}^1$

素因数の和:6513

約数の個数: 32

約数和(自身を含む): 65561400

約数和(自身を除く): 36683120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4520, 6389, 12778, 25556, 31945, 51112, 63890, 127780, 255560, 721957, 1443914, 2887828, 3609785, 5775656, 7219570, 14439140, 28878280]

約数ペア:

[(1, 28878280), (2, 14439140), (4, 7219570), (5, 5775656), (8, 3609785), (10, 2887828), (20, 1443914), (40, 721957), (113, 255560), (226, 127780), (452, 63890), (565, 51112), (904, 31945), (1130, 25556), (2260, 12778), (4520, 6389)]