20879760

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{719}}^1$

素因数の和:757

約数の個数: 120

約数和(自身を含む): 71245440

約数和(自身を除く): 50365680

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 33, 40, 44, 48, 55, 60, 66, 80, 88, 110, 120, 121, 132, 165, 176, 220, 240, 242, 264, 330, 363, 440, 484, 528, 605, 660, 719, 726, 880, 968, 1210, 1320, 1438, 1452, 1815, 1936, 2157, 2420, 2640, 2876, 2904, 3595, 3630, 4314, 4840, 5752, 5808, 7190, 7260, 7909, 8628, 9680, 10785, 11504, 14380, 14520, 15818, 17256, 21570, 23727, 28760, 29040, 31636, 34512, 39545, 43140, 47454, 57520, 63272, 79090, 86280, 86999, 94908, 118635, 126544, 158180, 172560, 173998, 189816, 237270, 260997, 316360, 347996, 379632, 434995, 474540, 521994, 632720, 695992, 869990, 949080, 1043988, 1304985, 1391984, 1739980, 1898160, 2087976, 2609970, 3479960, 4175952, 5219940, 6959920, 10439880, 20879760]

約数ペア:

[(1, 20879760), (2, 10439880), (3, 6959920), (4, 5219940), (5, 4175952), (6, 3479960), (8, 2609970), (10, 2087976), (11, 1898160), (12, 1739980), (15, 1391984), (16, 1304985), (20, 1043988), (22, 949080), (24, 869990), (30, 695992), (33, 632720), (40, 521994), (44, 474540), (48, 434995), (55, 379632), (60, 347996), (66, 316360), (80, 260997), (88, 237270), (110, 189816), (120, 173998), (121, 172560), (132, 158180), (165, 126544), (176, 118635), (220, 94908), (240, 86999), (242, 86280), (264, 79090), (330, 63272), (363, 57520), (440, 47454), (484, 43140), (528, 39545), (605, 34512), (660, 31636), (719, 29040), (726, 28760), (880, 23727), (968, 21570), (1210, 17256), (1320, 15818), (1438, 14520), (1452, 14380), (1815, 11504), (1936, 10785), (2157, 9680), (2420, 8628), (2640, 7909), (2876, 7260), (2904, 7190), (3595, 5808), (3630, 5752), (4314, 4840)]