20718480

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{173}}^1\times {\mathrm{499}}^1$

素因数の和:688

約数の個数: 80

約数和(自身を含む): 64728000

約数和(自身を除く): 44009520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 173, 240, 346, 499, 519, 692, 865, 998, 1038, 1384, 1497, 1730, 1996, 2076, 2495, 2595, 2768, 2994, 3460, 3992, 4152, 4990, 5190, 5988, 6920, 7485, 7984, 8304, 9980, 10380, 11976, 13840, 14970, 19960, 20760, 23952, 29940, 39920, 41520, 59880, 86327, 119760, 172654, 258981, 345308, 431635, 517962, 690616, 863270, 1035924, 1294905, 1381232, 1726540, 2071848, 2589810, 3453080, 4143696, 5179620, 6906160, 10359240, 20718480]

約数ペア:

[(1, 20718480), (2, 10359240), (3, 6906160), (4, 5179620), (5, 4143696), (6, 3453080), (8, 2589810), (10, 2071848), (12, 1726540), (15, 1381232), (16, 1294905), (20, 1035924), (24, 863270), (30, 690616), (40, 517962), (48, 431635), (60, 345308), (80, 258981), (120, 172654), (173, 119760), (240, 86327), (346, 59880), (499, 41520), (519, 39920), (692, 29940), (865, 23952), (998, 20760), (1038, 19960), (1384, 14970), (1497, 13840), (1730, 11976), (1996, 10380), (2076, 9980), (2495, 8304), (2595, 7984), (2768, 7485), (2994, 6920), (3460, 5988), (3992, 5190), (4152, 4990)]