21987992

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{1871}}^1$

素因数の和:2003

約数の個数: 32

約数和(自身を含む): 44815680

約数和(自身を除く): 22827688

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 113, 226, 452, 904, 1469, 1871, 2938, 3742, 5876, 7484, 11752, 14968, 24323, 48646, 97292, 194584, 211423, 422846, 845692, 1691384, 2748499, 5496998, 10993996, 21987992]

約数ペア:

[(1, 21987992), (2, 10993996), (4, 5496998), (8, 2748499), (13, 1691384), (26, 845692), (52, 422846), (104, 211423), (113, 194584), (226, 97292), (452, 48646), (904, 24323), (1469, 14968), (1871, 11752), (2938, 7484), (3742, 5876)]