20457520

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{113}}^1$

素因数の和:230

約数の個数: 80

約数和(自身を含む): 50211072

約数和(自身を除く): 29753552

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 73, 80, 113, 124, 146, 155, 226, 248, 292, 310, 365, 452, 496, 565, 584, 620, 730, 904, 1130, 1168, 1240, 1460, 1808, 2260, 2263, 2480, 2920, 3503, 4520, 4526, 5840, 7006, 8249, 9040, 9052, 11315, 14012, 16498, 17515, 18104, 22630, 28024, 32996, 35030, 36208, 41245, 45260, 56048, 65992, 70060, 82490, 90520, 131984, 140120, 164980, 181040, 255719, 280240, 329960, 511438, 659920, 1022876, 1278595, 2045752, 2557190, 4091504, 5114380, 10228760, 20457520]

約数ペア:

[(1, 20457520), (2, 10228760), (4, 5114380), (5, 4091504), (8, 2557190), (10, 2045752), (16, 1278595), (20, 1022876), (31, 659920), (40, 511438), (62, 329960), (73, 280240), (80, 255719), (113, 181040), (124, 164980), (146, 140120), (155, 131984), (226, 90520), (248, 82490), (292, 70060), (310, 65992), (365, 56048), (452, 45260), (496, 41245), (565, 36208), (584, 35030), (620, 32996), (730, 28024), (904, 22630), (1130, 18104), (1168, 17515), (1240, 16498), (1460, 14012), (1808, 11315), (2260, 9052), (2263, 9040), (2480, 8249), (2920, 7006), (3503, 5840), (4520, 4526)]