20742015

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{281}}^1$

素因数の和:352

約数の個数: 64

約数和(自身を含む): 41149440

約数和(自身を除く): 20407425

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 37, 57, 95, 105, 111, 133, 185, 259, 281, 285, 399, 555, 665, 703, 777, 843, 1295, 1405, 1967, 1995, 2109, 3515, 3885, 4215, 4921, 5339, 5901, 9835, 10397, 10545, 14763, 16017, 24605, 26695, 29505, 31191, 37373, 51985, 72779, 73815, 80085, 112119, 155955, 186865, 197543, 218337, 363895, 560595, 592629, 987715, 1091685, 1382801, 2963145, 4148403, 6914005, 20742015]

約数ペア:

[(1, 20742015), (3, 6914005), (5, 4148403), (7, 2963145), (15, 1382801), (19, 1091685), (21, 987715), (35, 592629), (37, 560595), (57, 363895), (95, 218337), (105, 197543), (111, 186865), (133, 155955), (185, 112119), (259, 80085), (281, 73815), (285, 72779), (399, 51985), (555, 37373), (665, 31191), (703, 29505), (777, 26695), (843, 24605), (1295, 16017), (1405, 14763), (1967, 10545), (1995, 10397), (2109, 9835), (3515, 5901), (3885, 5339), (4215, 4921)]