20122865780

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{251}}^1\times {\mathrm{50741}}^1$

素因数の和:51080

約数の個数: 48

約数和(自身を含む): 42964266240

約数和(自身を除く): 22841400460

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 251, 316, 395, 502, 790, 1004, 1255, 1580, 2510, 5020, 19829, 39658, 50741, 79316, 99145, 101482, 198290, 202964, 253705, 396580, 507410, 1014820, 4008539, 8017078, 12735991, 16034156, 20042695, 25471982, 40085390, 50943964, 63679955, 80170780, 127359910, 254719820, 1006143289, 2012286578, 4024573156, 5030716445, 10061432890, 20122865780]

約数ペア:

[(1, 20122865780), (2, 10061432890), (4, 5030716445), (5, 4024573156), (10, 2012286578), (20, 1006143289), (79, 254719820), (158, 127359910), (251, 80170780), (316, 63679955), (395, 50943964), (502, 40085390), (790, 25471982), (1004, 20042695), (1255, 16034156), (1580, 12735991), (2510, 8017078), (5020, 4008539), (19829, 1014820), (39658, 507410), (50741, 396580), (79316, 253705), (99145, 202964), (101482, 198290)]