21328978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{101}}^1\times {\mathrm{331}}^1$

素因数の和:474

約数の個数: 32

約数和(自身を含む): 36573120

約数和(自身を除く): 15244142

約数列:

[1, 2, 11, 22, 29, 58, 101, 202, 319, 331, 638, 662, 1111, 2222, 2929, 3641, 5858, 7282, 9599, 19198, 32219, 33431, 64438, 66862, 105589, 211178, 367741, 735482, 969499, 1938998, 10664489, 21328978]

約数ペア:

[(1, 21328978), (2, 10664489), (11, 1938998), (22, 969499), (29, 735482), (58, 367741), (101, 211178), (202, 105589), (319, 66862), (331, 64438), (638, 33431), (662, 32219), (1111, 19198), (2222, 9599), (2929, 7282), (3641, 5858)]