21132872

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{89}}^1\times {\mathrm{443}}^1$

素因数の和:605

約数の個数: 32

約数和(自身を含む): 40759200

約数和(自身を除く): 19626328

約数列:

[1, 2, 4, 8, 67, 89, 134, 178, 268, 356, 443, 536, 712, 886, 1772, 3544, 5963, 11926, 23852, 29681, 39427, 47704, 59362, 78854, 118724, 157708, 237448, 315416, 2641609, 5283218, 10566436, 21132872]

約数ペア:

[(1, 21132872), (2, 10566436), (4, 5283218), (8, 2641609), (67, 315416), (89, 237448), (134, 157708), (178, 118724), (268, 78854), (356, 59362), (443, 47704), (536, 39427), (712, 29681), (886, 23852), (1772, 11926), (3544, 5963)]