21053968

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{101221}}^1$

素因数の和:101242

約数の個数: 20

約数和(自身を含む): 43930348

約数和(自身を除く): 22876380

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 101221, 202442, 404884, 809768, 1315873, 1619536, 2631746, 5263492, 10526984, 21053968]

約数ペア:

[(1, 21053968), (2, 10526984), (4, 5263492), (8, 2631746), (13, 1619536), (16, 1315873), (26, 809768), (52, 404884), (104, 202442), (208, 101221)]