21770940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{491}}^1\times {\mathrm{739}}^1$

素因数の和:1242

約数の個数: 48

約数和(自身を含む): 61165440

約数和(自身を除く): 39394500

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 491, 739, 982, 1473, 1478, 1964, 2217, 2455, 2946, 2956, 3695, 4434, 4910, 5892, 7365, 7390, 8868, 9820, 11085, 14730, 14780, 22170, 29460, 44340, 362849, 725698, 1088547, 1451396, 1814245, 2177094, 3628490, 4354188, 5442735, 7256980, 10885470, 21770940]

約数ペア:

[(1, 21770940), (2, 10885470), (3, 7256980), (4, 5442735), (5, 4354188), (6, 3628490), (10, 2177094), (12, 1814245), (15, 1451396), (20, 1088547), (30, 725698), (60, 362849), (491, 44340), (739, 29460), (982, 22170), (1473, 14780), (1478, 14730), (1964, 11085), (2217, 9820), (2455, 8868), (2946, 7390), (2956, 7365), (3695, 5892), (4434, 4910)]