28172079

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1$

素因数の和:109

約数の個数: 72

約数和(自身を含む): 49926240

約数和(自身を除く): 21754161

約数列:

[1, 3, 9, 13, 19, 23, 29, 39, 57, 69, 87, 117, 171, 207, 247, 261, 299, 361, 377, 437, 551, 667, 741, 897, 1083, 1131, 1311, 1653, 2001, 2223, 2691, 3249, 3393, 3933, 4693, 4959, 5681, 6003, 7163, 8303, 8671, 10469, 12673, 14079, 17043, 21489, 24909, 26013, 31407, 38019, 42237, 51129, 64467, 74727, 78039, 94221, 107939, 114057, 136097, 164749, 240787, 323817, 408291, 494247, 722361, 971451, 1224873, 1482741, 2167083, 3130231, 9390693, 28172079]

約数ペア:

[(1, 28172079), (3, 9390693), (9, 3130231), (13, 2167083), (19, 1482741), (23, 1224873), (29, 971451), (39, 722361), (57, 494247), (69, 408291), (87, 323817), (117, 240787), (171, 164749), (207, 136097), (247, 114057), (261, 107939), (299, 94221), (361, 78039), (377, 74727), (437, 64467), (551, 51129), (667, 42237), (741, 38019), (897, 31407), (1083, 26013), (1131, 24909), (1311, 21489), (1653, 17043), (2001, 14079), (2223, 12673), (2691, 10469), (3249, 8671), (3393, 8303), (3933, 7163), (4693, 6003), (4959, 5681)]