21328976

素因数分解:

$2^4\times {\mathrm{47}}^1\times {\mathrm{113}}^1\times {\mathrm{251}}^1$

素因数の和:419

約数の個数: 40

約数和(自身を含む): 42747264

約数和(自身を除く): 21418288

約数列:

[1, 2, 4, 8, 16, 47, 94, 113, 188, 226, 251, 376, 452, 502, 752, 904, 1004, 1808, 2008, 4016, 5311, 10622, 11797, 21244, 23594, 28363, 42488, 47188, 56726, 84976, 94376, 113452, 188752, 226904, 453808, 1333061, 2666122, 5332244, 10664488, 21328976]

約数ペア:

[(1, 21328976), (2, 10664488), (4, 5332244), (8, 2666122), (16, 1333061), (47, 453808), (94, 226904), (113, 188752), (188, 113452), (226, 94376), (251, 84976), (376, 56726), (452, 47188), (502, 42488), (752, 28363), (904, 23594), (1004, 21244), (1808, 11797), (2008, 10622), (4016, 5311)]