21181740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{491}}^1\times {\mathrm{719}}^1$

素因数の和:1222

約数の個数: 48

約数和(自身を含む): 59512320

約数和(自身を除く): 38330580

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 491, 719, 982, 1438, 1473, 1964, 2157, 2455, 2876, 2946, 3595, 4314, 4910, 5892, 7190, 7365, 8628, 9820, 10785, 14380, 14730, 21570, 29460, 43140, 353029, 706058, 1059087, 1412116, 1765145, 2118174, 3530290, 4236348, 5295435, 7060580, 10590870, 21181740]

約数ペア:

[(1, 21181740), (2, 10590870), (3, 7060580), (4, 5295435), (5, 4236348), (6, 3530290), (10, 2118174), (12, 1765145), (15, 1412116), (20, 1059087), (30, 706058), (60, 353029), (491, 43140), (719, 29460), (982, 21570), (1438, 14730), (1473, 14380), (1964, 10785), (2157, 9820), (2455, 8628), (2876, 7365), (2946, 7190), (3595, 5892), (4314, 4910)]