21140108

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1$

素因数の和:254

約数の個数: 48

約数和(自身を含む): 41948928

約数和(自身を除く): 20808820

約数列:

[1, 2, 4, 11, 22, 44, 67, 71, 101, 134, 142, 202, 268, 284, 404, 737, 781, 1111, 1474, 1562, 2222, 2948, 3124, 4444, 4757, 6767, 7171, 9514, 13534, 14342, 19028, 27068, 28684, 52327, 74437, 78881, 104654, 148874, 157762, 209308, 297748, 315524, 480457, 960914, 1921828, 5285027, 10570054, 21140108]

約数ペア:

[(1, 21140108), (2, 10570054), (4, 5285027), (11, 1921828), (22, 960914), (44, 480457), (67, 315524), (71, 297748), (101, 209308), (134, 157762), (142, 148874), (202, 104654), (268, 78881), (284, 74437), (404, 52327), (737, 28684), (781, 27068), (1111, 19028), (1474, 14342), (1562, 13534), (2222, 9514), (2948, 7171), (3124, 6767), (4444, 4757)]