21403431

素因数分解:

$3^2\times 7^1\times {\mathrm{181}}^1\times {\mathrm{1877}}^1$

素因数の和:2071

約数の個数: 24

約数和(自身を含む): 35546784

約数和(自身を除く): 14143353

約数列:

[1, 3, 7, 9, 21, 63, 181, 543, 1267, 1629, 1877, 3801, 5631, 11403, 13139, 16893, 39417, 118251, 339737, 1019211, 2378159, 3057633, 7134477, 21403431]

約数ペア:

[(1, 21403431), (3, 7134477), (7, 3057633), (9, 2378159), (21, 1019211), (63, 339737), (181, 118251), (543, 39417), (1267, 16893), (1629, 13139), (1877, 11403), (3801, 5631)]