20937780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{293}}^1\times {\mathrm{397}}^1$

素因数の和:705

約数の個数: 72

約数和(自身を含む): 63888552

約数和(自身を除く): 42950772

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 293, 397, 586, 794, 879, 1172, 1191, 1465, 1588, 1758, 1985, 2382, 2637, 2930, 3516, 3573, 3970, 4395, 4764, 5274, 5860, 5955, 7146, 7940, 8790, 10548, 11910, 13185, 14292, 17580, 17865, 23820, 26370, 35730, 52740, 71460, 116321, 232642, 348963, 465284, 581605, 697926, 1046889, 1163210, 1395852, 1744815, 2093778, 2326420, 3489630, 4187556, 5234445, 6979260, 10468890, 20937780]

約数ペア:

[(1, 20937780), (2, 10468890), (3, 6979260), (4, 5234445), (5, 4187556), (6, 3489630), (9, 2326420), (10, 2093778), (12, 1744815), (15, 1395852), (18, 1163210), (20, 1046889), (30, 697926), (36, 581605), (45, 465284), (60, 348963), (90, 232642), (180, 116321), (293, 71460), (397, 52740), (586, 35730), (794, 26370), (879, 23820), (1172, 17865), (1191, 17580), (1465, 14292), (1588, 13185), (1758, 11910), (1985, 10548), (2382, 8790), (2637, 7940), (2930, 7146), (3516, 5955), (3573, 5860), (3970, 5274), (4395, 4764)]