21107788

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{4019}}^1$

素因数の和:4137

約数の個数: 24

約数和(自身を含む): 40183920

約数和(自身を除く): 19076132

約数列:

[1, 2, 4, 13, 26, 52, 101, 202, 404, 1313, 2626, 4019, 5252, 8038, 16076, 52247, 104494, 208988, 405919, 811838, 1623676, 5276947, 10553894, 21107788]

約数ペア:

[(1, 21107788), (2, 10553894), (4, 5276947), (13, 1623676), (26, 811838), (52, 405919), (101, 208988), (202, 104494), (404, 52247), (1313, 16076), (2626, 8038), (4019, 5252)]