21325557

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:293

約数の個数: 32

約数和(自身を含む): 32192640

約数和(自身を除く): 10867083

約数列:

[1, 3, 11, 33, 53, 89, 137, 159, 267, 411, 583, 979, 1507, 1749, 2937, 4521, 4717, 7261, 12193, 14151, 21783, 36579, 51887, 79871, 134123, 155661, 239613, 402369, 646229, 1938687, 7108519, 21325557]

約数ペア:

[(1, 21325557), (3, 7108519), (11, 1938687), (33, 646229), (53, 402369), (89, 239613), (137, 155661), (159, 134123), (267, 79871), (411, 51887), (583, 36579), (979, 21783), (1507, 14151), (1749, 12193), (2937, 7261), (4521, 4717)]