21971320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{599}}^1$

素因数の和:748

約数の個数: 64

約数和(自身を含む): 57024000

約数和(自身を除く): 35052680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 131, 140, 262, 280, 524, 599, 655, 917, 1048, 1198, 1310, 1834, 2396, 2620, 2995, 3668, 4193, 4585, 4792, 5240, 5990, 7336, 8386, 9170, 11980, 16772, 18340, 20965, 23960, 33544, 36680, 41930, 78469, 83860, 156938, 167720, 313876, 392345, 549283, 627752, 784690, 1098566, 1569380, 2197132, 2746415, 3138760, 4394264, 5492830, 10985660, 21971320]

約数ペア:

[(1, 21971320), (2, 10985660), (4, 5492830), (5, 4394264), (7, 3138760), (8, 2746415), (10, 2197132), (14, 1569380), (20, 1098566), (28, 784690), (35, 627752), (40, 549283), (56, 392345), (70, 313876), (131, 167720), (140, 156938), (262, 83860), (280, 78469), (524, 41930), (599, 36680), (655, 33544), (917, 23960), (1048, 20965), (1198, 18340), (1310, 16772), (1834, 11980), (2396, 9170), (2620, 8386), (2995, 7336), (3668, 5990), (4193, 5240), (4585, 4792)]