18565540780

素因数分解:

$2^2\times 5^1\times {\mathrm{42701}}^1\times {\mathrm{21739}}^1$

素因数の和:64449

約数の個数: 24

約数和(自身を含む): 38990342160

約数和(自身を除く): 20424801380

約数列:

[1, 2, 4, 5, 10, 20, 21739, 42701, 43478, 85402, 86956, 108695, 170804, 213505, 217390, 427010, 434780, 854020, 928277039, 1856554078, 3713108156, 4641385195, 9282770390, 18565540780]

約数ペア:

[(1, 18565540780), (2, 9282770390), (4, 4641385195), (5, 3713108156), (10, 1856554078), (20, 928277039), (21739, 854020), (42701, 434780), (43478, 427010), (85402, 217390), (86956, 213505), (108695, 170804)]