20297720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{11801}}^1$

素因数の和:11855

約数の個数: 32

約数和(自身を含む): 46735920

約数和(自身を除く): 26438200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 11801, 23602, 47204, 59005, 94408, 118010, 236020, 472040, 507443, 1014886, 2029772, 2537215, 4059544, 5074430, 10148860, 20297720]

約数ペア:

[(1, 20297720), (2, 10148860), (4, 5074430), (5, 4059544), (8, 2537215), (10, 2029772), (20, 1014886), (40, 507443), (43, 472040), (86, 236020), (172, 118010), (215, 94408), (344, 59005), (430, 47204), (860, 23602), (1720, 11801)]