21185890

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17509}}^1$

素因数の和:17538

約数の個数: 24

約数和(自身を含む): 41918940

約数和(自身を除く): 20733050

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 121, 242, 605, 1210, 17509, 35018, 87545, 175090, 192599, 385198, 962995, 1925990, 2118589, 4237178, 10592945, 21185890]

約数ペア:

[(1, 21185890), (2, 10592945), (5, 4237178), (10, 2118589), (11, 1925990), (22, 962995), (55, 385198), (110, 192599), (121, 175090), (242, 87545), (605, 35018), (1210, 17509)]