178790780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{17987}}^1$

素因数の和:18074

約数の個数: 48

約数和(自身を含む): 435165696

約数和(自身を除く): 256374916

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2485, 4970, 9940, 17987, 35974, 71948, 89935, 125909, 179870, 251818, 359740, 503636, 629545, 1259090, 1277077, 2518180, 2554154, 5108308, 6385385, 8939539, 12770770, 17879078, 25541540, 35758156, 44697695, 89395390, 178790780]

約数ペア:

[(1, 178790780), (2, 89395390), (4, 44697695), (5, 35758156), (7, 25541540), (10, 17879078), (14, 12770770), (20, 8939539), (28, 6385385), (35, 5108308), (70, 2554154), (71, 2518180), (140, 1277077), (142, 1259090), (284, 629545), (355, 503636), (497, 359740), (710, 251818), (994, 179870), (1420, 125909), (1988, 89935), (2485, 71948), (4970, 35974), (9940, 17987)]