221421520

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{25867}}^1$

素因数の和:25987

約数の個数: 40

約数和(自身を含む): 519636384

約数和(自身を除く): 298214864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 4280, 8560, 25867, 51734, 103468, 129335, 206936, 258670, 413872, 517340, 1034680, 2069360, 2767769, 5535538, 11071076, 13838845, 22142152, 27677690, 44284304, 55355380, 110710760, 221421520]

約数ペア:

[(1, 221421520), (2, 110710760), (4, 55355380), (5, 44284304), (8, 27677690), (10, 22142152), (16, 13838845), (20, 11071076), (40, 5535538), (80, 2767769), (107, 2069360), (214, 1034680), (428, 517340), (535, 413872), (856, 258670), (1070, 206936), (1712, 129335), (2140, 103468), (4280, 51734), (8560, 25867)]