12540020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{8831}}^1$

素因数の和:8911

約数の個数: 24

約数和(自身を含む): 26707968

約数和(自身を除く): 14167948

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 8831, 17662, 35324, 44155, 88310, 176620, 627001, 1254002, 2508004, 3135005, 6270010, 12540020]

約数ペア:

[(1, 12540020), (2, 6270010), (4, 3135005), (5, 2508004), (10, 1254002), (20, 627001), (71, 176620), (142, 88310), (284, 44155), (355, 35324), (710, 17662), (1420, 8831)]