20804840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{1109}}^1$

素因数の和:1194

約数の個数: 64

約数和(自身を含む): 54345600

約数和(自身を除く): 33540760

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, 1109, 1340, 1876, 2218, 2345, 2680, 3752, 4436, 4690, 5545, 7763, 8872, 9380, 11090, 15526, 18760, 22180, 31052, 38815, 44360, 62104, 74303, 77630, 148606, 155260, 297212, 310520, 371515, 520121, 594424, 743030, 1040242, 1486060, 2080484, 2600605, 2972120, 4160968, 5201210, 10402420, 20804840]

約数ペア:

[(1, 20804840), (2, 10402420), (4, 5201210), (5, 4160968), (7, 2972120), (8, 2600605), (10, 2080484), (14, 1486060), (20, 1040242), (28, 743030), (35, 594424), (40, 520121), (56, 371515), (67, 310520), (70, 297212), (134, 155260), (140, 148606), (268, 77630), (280, 74303), (335, 62104), (469, 44360), (536, 38815), (670, 31052), (938, 22180), (1109, 18760), (1340, 15526), (1876, 11090), (2218, 9380), (2345, 8872), (2680, 7763), (3752, 5545), (4436, 4690)]