21681980240

素因数分解:

$2^4\times 5^1\times {\mathrm{487}}^1\times {\mathrm{556519}}^1$

素因数の和:557019

約数の個数: 40

約数和(自身を含む): 50514207360

約数和(自身を除く): 28832227120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 487, 974, 1948, 2435, 3896, 4870, 7792, 9740, 19480, 38960, 556519, 1113038, 2226076, 2782595, 4452152, 5565190, 8904304, 11130380, 22260760, 44521520, 271024753, 542049506, 1084099012, 1355123765, 2168198024, 2710247530, 4336396048, 5420495060, 10840990120, 21681980240]

約数ペア:

[(1, 21681980240), (2, 10840990120), (4, 5420495060), (5, 4336396048), (8, 2710247530), (10, 2168198024), (16, 1355123765), (20, 1084099012), (40, 542049506), (80, 271024753), (487, 44521520), (974, 22260760), (1948, 11130380), (2435, 8904304), (3896, 5565190), (4870, 4452152), (7792, 2782595), (9740, 2226076), (19480, 1113038), (38960, 556519)]