21997173

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{12577}}^1$

素因数の和:12644

約数の個数: 16

約数和(自身を含む): 32602176

約数和(自身を除く): 10605003

約数列:

[1, 3, 11, 33, 53, 159, 583, 1749, 12577, 37731, 138347, 415041, 666581, 1999743, 7332391, 21997173]

約数ペア:

[(1, 21997173), (3, 7332391), (11, 1999743), (33, 666581), (53, 415041), (159, 138347), (583, 37731), (1749, 12577)]