21379384

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{661}}^1$

素因数の和:991

約数の個数: 32

約数和(自身を含む): 43374240

約数和(自身を除く): 21994856

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 311, 622, 661, 1244, 1322, 2488, 2644, 4043, 5288, 8086, 8593, 16172, 17186, 32344, 34372, 68744, 205571, 411142, 822284, 1644568, 2672423, 5344846, 10689692, 21379384]

約数ペア:

[(1, 21379384), (2, 10689692), (4, 5344846), (8, 2672423), (13, 1644568), (26, 822284), (52, 411142), (104, 205571), (311, 68744), (622, 34372), (661, 32344), (1244, 17186), (1322, 16172), (2488, 8593), (2644, 8086), (4043, 5288)]