21278900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{12517}}^1$

素因数の和:12548

約数の個数: 36

約数和(自身を含む): 48895308

約数和(自身を除く): 27616408

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 34, 50, 68, 85, 100, 170, 340, 425, 850, 1700, 12517, 25034, 50068, 62585, 125170, 212789, 250340, 312925, 425578, 625850, 851156, 1063945, 1251700, 2127890, 4255780, 5319725, 10639450, 21278900]

約数ペア:

[(1, 21278900), (2, 10639450), (4, 5319725), (5, 4255780), (10, 2127890), (17, 1251700), (20, 1063945), (25, 851156), (34, 625850), (50, 425578), (68, 312925), (85, 250340), (100, 212789), (170, 125170), (340, 62585), (425, 50068), (850, 25034), (1700, 12517)]