19902840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{165857}}^1$

素因数の和:165871

約数の個数: 32

約数和(自身を含む): 59708880

約数和(自身を除く): 39806040

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 165857, 331714, 497571, 663428, 829285, 995142, 1326856, 1658570, 1990284, 2487855, 3317140, 3980568, 4975710, 6634280, 9951420, 19902840]

約数ペア:

[(1, 19902840), (2, 9951420), (3, 6634280), (4, 4975710), (5, 3980568), (6, 3317140), (8, 2487855), (10, 1990284), (12, 1658570), (15, 1326856), (20, 995142), (24, 829285), (30, 663428), (40, 497571), (60, 331714), (120, 165857)]