18880520

素因数分解:

$2^3\times 5^1\times {\mathrm{317}}^1\times {\mathrm{1489}}^1$

素因数の和:1817

約数の個数: 32

約数和(自身を含む): 42643800

約数和(自身を除く): 23763280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 317, 634, 1268, 1489, 1585, 2536, 2978, 3170, 5956, 6340, 7445, 11912, 12680, 14890, 29780, 59560, 472013, 944026, 1888052, 2360065, 3776104, 4720130, 9440260, 18880520]

約数ペア:

[(1, 18880520), (2, 9440260), (4, 4720130), (5, 3776104), (8, 2360065), (10, 1888052), (20, 944026), (40, 472013), (317, 59560), (634, 29780), (1268, 14890), (1489, 12680), (1585, 11912), (2536, 7445), (2978, 6340), (3170, 5956)]