21026439

素因数分解:

$3^3\times 7^2\times {\mathrm{23}}^1\times {\mathrm{691}}^1$

素因数の和:737

約数の個数: 48

約数和(自身を含む): 37866240

約数和(自身を除く): 16839801

約数列:

[1, 3, 7, 9, 21, 23, 27, 49, 63, 69, 147, 161, 189, 207, 441, 483, 621, 691, 1127, 1323, 1449, 2073, 3381, 4347, 4837, 6219, 10143, 14511, 15893, 18657, 30429, 33859, 43533, 47679, 101577, 111251, 130599, 143037, 304731, 333753, 429111, 778757, 914193, 1001259, 2336271, 3003777, 7008813, 21026439]

約数ペア:

[(1, 21026439), (3, 7008813), (7, 3003777), (9, 2336271), (21, 1001259), (23, 914193), (27, 778757), (49, 429111), (63, 333753), (69, 304731), (147, 143037), (161, 130599), (189, 111251), (207, 101577), (441, 47679), (483, 43533), (621, 33859), (691, 30429), (1127, 18657), (1323, 15893), (1449, 14511), (2073, 10143), (3381, 6219), (4347, 4837)]