81428237.000000000

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{223}}^1\times {\mathrm{10369}}^1$

素因数の和:10604

約数の個数: 48

約数和(自身を含む): 390243840

約数和(自身を除く): 251506620

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 223, 446, 669, 892, 1115, 1338, 2230, 2676, 3345, 4460, 6690, 10369, 13380, 20738, 31107, 41476, 51845, 62214, 103690, 124428, 155535, 207380, 311070, 622140, 2312287, 4624574, 6936861, 9249148, 11561435, 13873722, 23122870, 27747444, 34684305, 46245740, 69368610, 138737220]

約数ペア:

[(1, 138737220), (2, 69368610), (3, 46245740), (4, 34684305), (5, 27747444), (6, 23122870), (10, 13873722), (12, 11561435), (15, 9249148), (20, 6936861), (30, 4624574), (60, 2312287), (223, 622140), (446, 311070), (669, 207380), (892, 155535), (1115, 124428), (1338, 103690), (2230, 62214), (2676, 51845), (3345, 41476), (4460, 31107), (6690, 20738), (10369, 13380)]