689506390

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^2\times {\mathrm{389}}^1\times {\mathrm{491}}^1$

素因数の和:925

約数の個数: 48

約数和(自身を含む): 1315913040

約数和(自身を除く): 626406650

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 361, 389, 491, 722, 778, 982, 1805, 1945, 2455, 3610, 3890, 4910, 7391, 9329, 14782, 18658, 36955, 46645, 73910, 93290, 140429, 177251, 190999, 280858, 354502, 381998, 702145, 886255, 954995, 1404290, 1772510, 1909990, 3628981, 7257962, 18144905, 36289810, 68950639, 137901278, 344753195, 689506390]

約数ペア:

[(1, 689506390), (2, 344753195), (5, 137901278), (10, 68950639), (19, 36289810), (38, 18144905), (95, 7257962), (190, 3628981), (361, 1909990), (389, 1772510), (491, 1404290), (722, 954995), (778, 886255), (982, 702145), (1805, 381998), (1945, 354502), (2455, 280858), (3610, 190999), (3890, 177251), (4910, 140429), (7391, 93290), (9329, 73910), (14782, 46645), (18658, 36955)]