18258500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{53}}^2$

素因数の和:138

約数の個数: 72

約数和(自身を含む): 43769544

約数和(自身を除く): 25511044

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 53, 65, 100, 106, 125, 130, 212, 250, 260, 265, 325, 500, 530, 650, 689, 1060, 1300, 1325, 1378, 1625, 2650, 2756, 2809, 3250, 3445, 5300, 5618, 6500, 6625, 6890, 11236, 13250, 13780, 14045, 17225, 26500, 28090, 34450, 36517, 56180, 68900, 70225, 73034, 86125, 140450, 146068, 172250, 182585, 280900, 344500, 351125, 365170, 702250, 730340, 912925, 1404500, 1825850, 3651700, 4564625, 9129250, 18258500]

約数ペア:

[(1, 18258500), (2, 9129250), (4, 4564625), (5, 3651700), (10, 1825850), (13, 1404500), (20, 912925), (25, 730340), (26, 702250), (50, 365170), (52, 351125), (53, 344500), (65, 280900), (100, 182585), (106, 172250), (125, 146068), (130, 140450), (212, 86125), (250, 73034), (260, 70225), (265, 68900), (325, 56180), (500, 36517), (530, 34450), (650, 28090), (689, 26500), (1060, 17225), (1300, 14045), (1325, 13780), (1378, 13250), (1625, 11236), (2650, 6890), (2756, 6625), (2809, 6500), (3250, 5618), (3445, 5300)]