81355920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{257}}^1\times {\mathrm{1319}}^1$

素因数の和:1592

約数の個数: 80

約数和(自身を含む): 253376640

約数和(自身を除く): 172020720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 257, 514, 771, 1028, 1285, 1319, 1542, 2056, 2570, 2638, 3084, 3855, 3957, 4112, 5140, 5276, 6168, 6595, 7710, 7914, 10280, 10552, 12336, 13190, 15420, 15828, 19785, 20560, 21104, 26380, 30840, 31656, 39570, 52760, 61680, 63312, 79140, 105520, 158280, 316560, 338983, 677966, 1016949, 1355932, 1694915, 2033898, 2711864, 3389830, 4067796, 5084745, 5423728, 6779660, 8135592, 10169490, 13559320, 16271184, 20338980, 27118640, 40677960, 81355920]

約数ペア:

[(1, 81355920), (2, 40677960), (3, 27118640), (4, 20338980), (5, 16271184), (6, 13559320), (8, 10169490), (10, 8135592), (12, 6779660), (15, 5423728), (16, 5084745), (20, 4067796), (24, 3389830), (30, 2711864), (40, 2033898), (48, 1694915), (60, 1355932), (80, 1016949), (120, 677966), (240, 338983), (257, 316560), (514, 158280), (771, 105520), (1028, 79140), (1285, 63312), (1319, 61680), (1542, 52760), (2056, 39570), (2570, 31656), (2638, 30840), (3084, 26380), (3855, 21104), (3957, 20560), (4112, 19785), (5140, 15828), (5276, 15420), (6168, 13190), (6595, 12336), (7710, 10552), (7914, 10280)]