21317764

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{2081}}^1$

素因数の和:2295

約数の個数: 24

約数和(自身を含む): 40399128

約数和(自身を除く): 19081364

約数列:

[1, 2, 4, 13, 26, 52, 197, 394, 788, 2081, 2561, 4162, 5122, 8324, 10244, 27053, 54106, 108212, 409957, 819914, 1639828, 5329441, 10658882, 21317764]

約数ペア:

[(1, 21317764), (2, 10658882), (4, 5329441), (13, 1639828), (26, 819914), (52, 409957), (197, 108212), (394, 54106), (788, 27053), (2081, 10244), (2561, 8324), (4162, 5122)]