21440705

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{191}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 30578688

約数和(自身を除く): 9137983

約数列:

[1, 5, 11, 13, 55, 65, 143, 157, 191, 715, 785, 955, 1727, 2041, 2101, 2483, 8635, 10205, 10505, 12415, 22451, 27313, 29987, 112255, 136565, 149935, 329857, 389831, 1649285, 1949155, 4288141, 21440705]

約数ペア:

[(1, 21440705), (5, 4288141), (11, 1949155), (13, 1649285), (55, 389831), (65, 329857), (143, 149935), (157, 136565), (191, 112255), (715, 29987), (785, 27313), (955, 22451), (1727, 12415), (2041, 10505), (2101, 10205), (2483, 8635)]