20157620

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{307}}^1$

素因数の和:397

約数の個数: 72

約数和(自身を含む): 50139936

約数和(自身を除く): 29982316

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 67, 70, 98, 134, 140, 196, 245, 268, 307, 335, 469, 490, 614, 670, 938, 980, 1228, 1340, 1535, 1876, 2149, 2345, 3070, 3283, 4298, 4690, 6140, 6566, 8596, 9380, 10745, 13132, 15043, 16415, 20569, 21490, 30086, 32830, 41138, 42980, 60172, 65660, 75215, 82276, 102845, 143983, 150430, 205690, 287966, 300860, 411380, 575932, 719915, 1007881, 1439830, 2015762, 2879660, 4031524, 5039405, 10078810, 20157620]

約数ペア:

[(1, 20157620), (2, 10078810), (4, 5039405), (5, 4031524), (7, 2879660), (10, 2015762), (14, 1439830), (20, 1007881), (28, 719915), (35, 575932), (49, 411380), (67, 300860), (70, 287966), (98, 205690), (134, 150430), (140, 143983), (196, 102845), (245, 82276), (268, 75215), (307, 65660), (335, 60172), (469, 42980), (490, 41138), (614, 32830), (670, 30086), (938, 21490), (980, 20569), (1228, 16415), (1340, 15043), (1535, 13132), (1876, 10745), (2149, 9380), (2345, 8596), (3070, 6566), (3283, 6140), (4298, 4690)]