21905793

素因数分解:

$3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{3821}}^1$

素因数の和:3854

約数の個数: 36

約数和(自身を含む): 39649428

約数和(自身を除く): 17743635

約数列:

[1, 3, 7, 9, 13, 21, 39, 49, 63, 91, 117, 147, 273, 441, 637, 819, 1911, 3821, 5733, 11463, 26747, 34389, 49673, 80241, 149019, 187229, 240723, 347711, 447057, 561687, 1043133, 1685061, 2433977, 3129399, 7301931, 21905793]

約数ペア:

[(1, 21905793), (3, 7301931), (7, 3129399), (9, 2433977), (13, 1685061), (21, 1043133), (39, 561687), (49, 447057), (63, 347711), (91, 240723), (117, 187229), (147, 149019), (273, 80241), (441, 49673), (637, 34389), (819, 26747), (1911, 11463), (3821, 5733)]