8990020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{487}}^1$

素因数の和:580

約数の個数: 48

約数和(自身を含む): 20659968

約数和(自身を除く): 11669948

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 71, 130, 142, 260, 284, 355, 487, 710, 923, 974, 1420, 1846, 1948, 2435, 3692, 4615, 4870, 6331, 9230, 9740, 12662, 18460, 25324, 31655, 34577, 63310, 69154, 126620, 138308, 172885, 345770, 449501, 691540, 899002, 1798004, 2247505, 4495010, 8990020]

約数ペア:

[(1, 8990020), (2, 4495010), (4, 2247505), (5, 1798004), (10, 899002), (13, 691540), (20, 449501), (26, 345770), (52, 172885), (65, 138308), (71, 126620), (130, 69154), (142, 63310), (260, 34577), (284, 31655), (355, 25324), (487, 18460), (710, 12662), (923, 9740), (974, 9230), (1420, 6331), (1846, 4870), (1948, 4615), (2435, 3692)]