21950187

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{271}}^1$

素因数の和:336

約数の個数: 48

約数和(自身を含む): 37209600

約数和(自身を除く): 15259413

約数列:

[1, 3, 7, 19, 21, 29, 49, 57, 87, 133, 147, 203, 271, 399, 551, 609, 813, 931, 1421, 1653, 1897, 2793, 3857, 4263, 5149, 5691, 7859, 11571, 13279, 15447, 23577, 26999, 36043, 39837, 55013, 80997, 108129, 149321, 165039, 252301, 385091, 447963, 756903, 1045247, 1155273, 3135741, 7316729, 21950187]

約数ペア:

[(1, 21950187), (3, 7316729), (7, 3135741), (19, 1155273), (21, 1045247), (29, 756903), (49, 447963), (57, 385091), (87, 252301), (133, 165039), (147, 149321), (203, 108129), (271, 80997), (399, 55013), (551, 39837), (609, 36043), (813, 26999), (931, 23577), (1421, 15447), (1653, 13279), (1897, 11571), (2793, 7859), (3857, 5691), (4263, 5149)]