21356289

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{59}}^1\times {\mathrm{1087}}^1$

素因数の和:1189

約数の個数: 24

約数和(自身を含む): 32248320

約数和(自身を除く): 10892031

約数列:

[1, 3, 9, 37, 59, 111, 177, 333, 531, 1087, 2183, 3261, 6549, 9783, 19647, 40219, 64133, 120657, 192399, 361971, 577197, 2372921, 7118763, 21356289]

約数ペア:

[(1, 21356289), (3, 7118763), (9, 2372921), (37, 577197), (59, 361971), (111, 192399), (177, 120657), (333, 64133), (531, 40219), (1087, 19647), (2183, 9783), (3261, 6549)]