21215760

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{811}}^1$

素因数の和:936

約数の個数: 80

約数和(自身を含む): 66454080

約数和(自身を除く): 45238320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 109, 120, 218, 240, 327, 436, 545, 654, 811, 872, 1090, 1308, 1622, 1635, 1744, 2180, 2433, 2616, 3244, 3270, 4055, 4360, 4866, 5232, 6488, 6540, 8110, 8720, 9732, 12165, 12976, 13080, 16220, 19464, 24330, 26160, 32440, 38928, 48660, 64880, 88399, 97320, 176798, 194640, 265197, 353596, 441995, 530394, 707192, 883990, 1060788, 1325985, 1414384, 1767980, 2121576, 2651970, 3535960, 4243152, 5303940, 7071920, 10607880, 21215760]

約数ペア:

[(1, 21215760), (2, 10607880), (3, 7071920), (4, 5303940), (5, 4243152), (6, 3535960), (8, 2651970), (10, 2121576), (12, 1767980), (15, 1414384), (16, 1325985), (20, 1060788), (24, 883990), (30, 707192), (40, 530394), (48, 441995), (60, 353596), (80, 265197), (109, 194640), (120, 176798), (218, 97320), (240, 88399), (327, 64880), (436, 48660), (545, 38928), (654, 32440), (811, 26160), (872, 24330), (1090, 19464), (1308, 16220), (1622, 13080), (1635, 12976), (1744, 12165), (2180, 9732), (2433, 8720), (2616, 8110), (3244, 6540), (3270, 6488), (4055, 5232), (4360, 4866)]