21988604

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{181}}^1\times {\mathrm{251}}^1$

素因数の和:458

約数の個数: 36

約数和(自身を含む): 42699384

約数和(自身を除く): 20710780

約数列:

[1, 2, 4, 11, 22, 44, 121, 181, 242, 251, 362, 484, 502, 724, 1004, 1991, 2761, 3982, 5522, 7964, 11044, 21901, 30371, 43802, 45431, 60742, 87604, 90862, 121484, 181724, 499741, 999482, 1998964, 5497151, 10994302, 21988604]

約数ペア:

[(1, 21988604), (2, 10994302), (4, 5497151), (11, 1998964), (22, 999482), (44, 499741), (121, 181724), (181, 121484), (242, 90862), (251, 87604), (362, 60742), (484, 45431), (502, 43802), (724, 30371), (1004, 21901), (1991, 11044), (2761, 7964), (3982, 5522)]