21251997

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{191}}^1\times {\mathrm{317}}^1$

素因数の和:530

約数の個数: 32

約数和(自身を含む): 34191360

約数和(自身を除く): 12939363

約数列:

[1, 3, 9, 13, 27, 39, 117, 191, 317, 351, 573, 951, 1719, 2483, 2853, 4121, 5157, 7449, 8559, 12363, 22347, 37089, 60547, 67041, 111267, 181641, 544923, 787111, 1634769, 2361333, 7083999, 21251997]

約数ペア:

[(1, 21251997), (3, 7083999), (9, 2361333), (13, 1634769), (27, 787111), (39, 544923), (117, 181641), (191, 111267), (317, 67041), (351, 60547), (573, 37089), (951, 22347), (1719, 12363), (2483, 8559), (2853, 7449), (4121, 5157)]