81208040

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{20101}}^1$

素因数の和:20213

約数の個数: 32

約数和(自身を含む): 184536360

約数和(自身を除く): 103328320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 20101, 40202, 80404, 100505, 160808, 201010, 402020, 804040, 2030201, 4060402, 8120804, 10151005, 16241608, 20302010, 40604020, 81208040]

約数ペア:

[(1, 81208040), (2, 40604020), (4, 20302010), (5, 16241608), (8, 10151005), (10, 8120804), (20, 4060402), (40, 2030201), (101, 804040), (202, 402020), (404, 201010), (505, 160808), (808, 100505), (1010, 80404), (2020, 40202), (4040, 20101)]