21538276

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{419}}^1$

素因数の和:675

約数の個数: 24

約数和(自身を含む): 38525760

約数和(自身を除く): 16987484

約数列:

[1, 2, 4, 71, 142, 181, 284, 362, 419, 724, 838, 1676, 12851, 25702, 29749, 51404, 59498, 75839, 118996, 151678, 303356, 5384569, 10769138, 21538276]

約数ペア:

[(1, 21538276), (2, 10769138), (4, 5384569), (71, 303356), (142, 151678), (181, 118996), (284, 75839), (362, 59498), (419, 51404), (724, 29749), (838, 25702), (1676, 12851)]