21075760

素因数分解:

$2^4\times 5^1\times {\mathrm{463}}^1\times {\mathrm{569}}^1$

素因数の和:1045

約数の個数: 40

約数和(自身を含む): 49193280

約数和(自身を除く): 28117520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 463, 569, 926, 1138, 1852, 2276, 2315, 2845, 3704, 4552, 4630, 5690, 7408, 9104, 9260, 11380, 18520, 22760, 37040, 45520, 263447, 526894, 1053788, 1317235, 2107576, 2634470, 4215152, 5268940, 10537880, 21075760]

約数ペア:

[(1, 21075760), (2, 10537880), (4, 5268940), (5, 4215152), (8, 2634470), (10, 2107576), (16, 1317235), (20, 1053788), (40, 526894), (80, 263447), (463, 45520), (569, 37040), (926, 22760), (1138, 18520), (1852, 11380), (2276, 9260), (2315, 9104), (2845, 7408), (3704, 5690), (4552, 4630)]