21254560

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1871}}^1$

素因数の和:1957

約数の個数: 48

約数和(自身を含む): 50948352

約数和(自身を除く): 29693792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 142, 160, 284, 355, 568, 710, 1136, 1420, 1871, 2272, 2840, 3742, 5680, 7484, 9355, 11360, 14968, 18710, 29936, 37420, 59872, 74840, 132841, 149680, 265682, 299360, 531364, 664205, 1062728, 1328410, 2125456, 2656820, 4250912, 5313640, 10627280, 21254560]

約数ペア:

[(1, 21254560), (2, 10627280), (4, 5313640), (5, 4250912), (8, 2656820), (10, 2125456), (16, 1328410), (20, 1062728), (32, 664205), (40, 531364), (71, 299360), (80, 265682), (142, 149680), (160, 132841), (284, 74840), (355, 59872), (568, 37420), (710, 29936), (1136, 18710), (1420, 14968), (1871, 11360), (2272, 9355), (2840, 7484), (3742, 5680)]