31831821

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1$

素因数の和:199

約数の個数: 72

約数和(自身を含む): 58687200

約数和(自身を除く): 26855379

約数列:

[1, 3, 7, 9, 19, 21, 29, 49, 57, 63, 87, 131, 133, 147, 171, 203, 261, 393, 399, 441, 551, 609, 917, 931, 1179, 1197, 1421, 1653, 1827, 2489, 2751, 2793, 3799, 3857, 4263, 4959, 6419, 7467, 8253, 8379, 11397, 11571, 12789, 17423, 19257, 22401, 26593, 26999, 34191, 34713, 52269, 57771, 72181, 79779, 80997, 121961, 156807, 186151, 216543, 239337, 242991, 365883, 505267, 558453, 649629, 1097649, 1515801, 1675359, 3536869, 4547403, 10610607, 31831821]

約数ペア:

[(1, 31831821), (3, 10610607), (7, 4547403), (9, 3536869), (19, 1675359), (21, 1515801), (29, 1097649), (49, 649629), (57, 558453), (63, 505267), (87, 365883), (131, 242991), (133, 239337), (147, 216543), (171, 186151), (203, 156807), (261, 121961), (393, 80997), (399, 79779), (441, 72181), (551, 57771), (609, 52269), (917, 34713), (931, 34191), (1179, 26999), (1197, 26593), (1421, 22401), (1653, 19257), (1827, 17423), (2489, 12789), (2751, 11571), (2793, 11397), (3799, 8379), (3857, 8253), (4263, 7467), (4959, 6419)]