21997197

素因数分解:

$3^3\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{641}}^1$

素因数の和:722

約数の個数: 32

約数和(自身を含む): 34513920

約数和(自身を除く): 12516723

約数列:

[1, 3, 9, 27, 31, 41, 93, 123, 279, 369, 641, 837, 1107, 1271, 1923, 3813, 5769, 11439, 17307, 19871, 26281, 34317, 59613, 78843, 178839, 236529, 536517, 709587, 814711, 2444133, 7332399, 21997197]

約数ペア:

[(1, 21997197), (3, 7332399), (9, 2444133), (27, 814711), (31, 709587), (41, 536517), (93, 236529), (123, 178839), (279, 78843), (369, 59613), (641, 34317), (837, 26281), (1107, 19871), (1271, 17307), (1923, 11439), (3813, 5769)]