20478885

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:194

約数の個数: 64

約数和(自身を含む): 39481344

約数和(自身を除く): 19002459

約数列:

[1, 3, 5, 7, 15, 21, 35, 41, 67, 71, 105, 123, 201, 205, 213, 287, 335, 355, 469, 497, 615, 861, 1005, 1065, 1407, 1435, 1491, 2345, 2485, 2747, 2911, 4305, 4757, 7035, 7455, 8241, 8733, 13735, 14271, 14555, 19229, 20377, 23785, 33299, 41205, 43665, 57687, 61131, 71355, 96145, 99897, 101885, 166495, 195037, 288435, 305655, 499485, 585111, 975185, 1365259, 2925555, 4095777, 6826295, 20478885]

約数ペア:

[(1, 20478885), (3, 6826295), (5, 4095777), (7, 2925555), (15, 1365259), (21, 975185), (35, 585111), (41, 499485), (67, 305655), (71, 288435), (105, 195037), (123, 166495), (201, 101885), (205, 99897), (213, 96145), (287, 71355), (335, 61131), (355, 57687), (469, 43665), (497, 41205), (615, 33299), (861, 23785), (1005, 20377), (1065, 19229), (1407, 14555), (1435, 14271), (1491, 13735), (2345, 8733), (2485, 8241), (2747, 7455), (2911, 7035), (4305, 4757)]