19879905

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1\times {\mathrm{151}}^1$

素因数の和:357

約数の個数: 32

約数和(自身を含む): 32744448

約数和(自身を除く): 12864543

約数列:

[1, 3, 5, 15, 67, 131, 151, 201, 335, 393, 453, 655, 755, 1005, 1965, 2265, 8777, 10117, 19781, 26331, 30351, 43885, 50585, 59343, 98905, 131655, 151755, 296715, 1325327, 3975981, 6626635, 19879905]

約数ペア:

[(1, 19879905), (3, 6626635), (5, 3975981), (15, 1325327), (67, 296715), (131, 151755), (151, 131655), (201, 98905), (335, 59343), (393, 50585), (453, 43885), (655, 30351), (755, 26331), (1005, 19781), (1965, 10117), (2265, 8777)]