28013839

素因数分解:

$7^3\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:164

約数の個数: 32

約数和(自身を含む): 35251200

約数和(自身を除く): 7237361

約数列:

[1, 7, 23, 49, 53, 67, 161, 343, 371, 469, 1127, 1219, 1541, 2597, 3283, 3551, 7889, 8533, 10787, 18179, 22981, 24857, 59731, 75509, 81673, 173999, 418117, 528563, 571711, 1217993, 4001977, 28013839]

約数ペア:

[(1, 28013839), (7, 4001977), (23, 1217993), (49, 571711), (53, 528563), (67, 418117), (161, 173999), (343, 81673), (371, 75509), (469, 59731), (1127, 24857), (1219, 22981), (1541, 18179), (2597, 10787), (3283, 8533), (3551, 7889)]