21630280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{1153}}^1$

素因数の和:1238

約数の個数: 64

約数和(自身を含む): 56499840

約数和(自身を除く): 34869560

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 67, 70, 134, 140, 268, 280, 335, 469, 536, 670, 938, 1153, 1340, 1876, 2306, 2345, 2680, 3752, 4612, 4690, 5765, 8071, 9224, 9380, 11530, 16142, 18760, 23060, 32284, 40355, 46120, 64568, 77251, 80710, 154502, 161420, 309004, 322840, 386255, 540757, 618008, 772510, 1081514, 1545020, 2163028, 2703785, 3090040, 4326056, 5407570, 10815140, 21630280]

約数ペア:

[(1, 21630280), (2, 10815140), (4, 5407570), (5, 4326056), (7, 3090040), (8, 2703785), (10, 2163028), (14, 1545020), (20, 1081514), (28, 772510), (35, 618008), (40, 540757), (56, 386255), (67, 322840), (70, 309004), (134, 161420), (140, 154502), (268, 80710), (280, 77251), (335, 64568), (469, 46120), (536, 40355), (670, 32284), (938, 23060), (1153, 18760), (1340, 16142), (1876, 11530), (2306, 9380), (2345, 9224), (2680, 8071), (3752, 5765), (4612, 4690)]