21267320

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4969}}^1$

素因数の和:5087

約数の個数: 32

約数和(自身を含む): 48308400

約数和(自身を除く): 27041080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4969, 9938, 19876, 24845, 39752, 49690, 99380, 198760, 531683, 1063366, 2126732, 2658415, 4253464, 5316830, 10633660, 21267320]

約数ペア:

[(1, 21267320), (2, 10633660), (4, 5316830), (5, 4253464), (8, 2658415), (10, 2126732), (20, 1063366), (40, 531683), (107, 198760), (214, 99380), (428, 49690), (535, 39752), (856, 24845), (1070, 19876), (2140, 9938), (4280, 4969)]