20348865

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{503}}^1$

素因数の和:574

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 17390655

約数列:

[1, 3, 5, 9, 15, 29, 31, 45, 87, 93, 145, 155, 261, 279, 435, 465, 503, 899, 1305, 1395, 1509, 2515, 2697, 4495, 4527, 7545, 8091, 13485, 14587, 15593, 22635, 40455, 43761, 46779, 72935, 77965, 131283, 140337, 218805, 233895, 452197, 656415, 701685, 1356591, 2260985, 4069773, 6782955, 20348865]

約数ペア:

[(1, 20348865), (3, 6782955), (5, 4069773), (9, 2260985), (15, 1356591), (29, 701685), (31, 656415), (45, 452197), (87, 233895), (93, 218805), (145, 140337), (155, 131283), (261, 77965), (279, 72935), (435, 46779), (465, 43761), (503, 40455), (899, 22635), (1305, 15593), (1395, 14587), (1509, 13485), (2515, 8091), (2697, 7545), (4495, 4527)]