51409840

素因数分解:

$2^4\times 5^1\times {\mathrm{642623}}^1$

素因数の和:642636

約数の個数: 20

約数和(自身を含む): 119528064

約数和(自身を除く): 68118224

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 642623, 1285246, 2570492, 3213115, 5140984, 6426230, 10281968, 12852460, 25704920, 51409840]

約数ペア:

[(1, 51409840), (2, 25704920), (4, 12852460), (5, 10281968), (8, 6426230), (10, 5140984), (16, 3213115), (20, 2570492), (40, 1285246), (80, 642623)]