128857421

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{1459}}^1$

素因数の和:1545

約数の個数: 32

約数和(自身を含む): 170434560

約数和(自身を除く): 41577139

約数列:

[1, 7, 11, 31, 37, 77, 217, 259, 341, 407, 1147, 1459, 2387, 2849, 8029, 10213, 12617, 16049, 45229, 53983, 88319, 112343, 316603, 377881, 497519, 593813, 1673473, 3482633, 4156691, 11714311, 18408203, 128857421]

約数ペア:

[(1, 128857421), (7, 18408203), (11, 11714311), (31, 4156691), (37, 3482633), (77, 1673473), (217, 593813), (259, 497519), (341, 377881), (407, 316603), (1147, 112343), (1459, 88319), (2387, 53983), (2849, 45229), (8029, 16049), (10213, 12617)]