21447387

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{263}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 36324288

約数和(自身を除く): 14876901

約数列:

[1, 3, 9, 13, 17, 39, 41, 51, 117, 123, 153, 221, 263, 369, 533, 663, 697, 789, 1599, 1989, 2091, 2367, 3419, 4471, 4797, 6273, 9061, 10257, 10783, 13413, 27183, 30771, 32349, 40239, 58123, 81549, 97047, 140179, 174369, 183311, 420537, 523107, 549933, 1261611, 1649799, 2383043, 7149129, 21447387]

約数ペア:

[(1, 21447387), (3, 7149129), (9, 2383043), (13, 1649799), (17, 1261611), (39, 549933), (41, 523107), (51, 420537), (117, 183311), (123, 174369), (153, 140179), (221, 97047), (263, 81549), (369, 58123), (533, 40239), (663, 32349), (697, 30771), (789, 27183), (1599, 13413), (1989, 10783), (2091, 10257), (2367, 9061), (3419, 6273), (4471, 4797)]