21898877

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{167}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 29804544

約数和(自身を除く): 7905667

約数列:

[1, 7, 11, 13, 77, 91, 131, 143, 167, 917, 1001, 1169, 1441, 1703, 1837, 2171, 10087, 11921, 12859, 15197, 18733, 21877, 23881, 131131, 153139, 167167, 240647, 284401, 1684529, 1990807, 3128411, 21898877]

約数ペア:

[(1, 21898877), (7, 3128411), (11, 1990807), (13, 1684529), (77, 284401), (91, 240647), (131, 167167), (143, 153139), (167, 131131), (917, 23881), (1001, 21877), (1169, 18733), (1441, 15197), (1703, 12859), (1837, 11921), (2171, 10087)]