21318800

素因数分解:

$2^4\times 5^2\times {\mathrm{223}}^1\times {\mathrm{239}}^1$

素因数の和:480

約数の個数: 60

約数和(自身を含む): 51663360

約数和(自身を除く): 30344560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 223, 239, 400, 446, 478, 892, 956, 1115, 1195, 1784, 1912, 2230, 2390, 3568, 3824, 4460, 4780, 5575, 5975, 8920, 9560, 11150, 11950, 17840, 19120, 22300, 23900, 44600, 47800, 53297, 89200, 95600, 106594, 213188, 266485, 426376, 532970, 852752, 1065940, 1332425, 2131880, 2664850, 4263760, 5329700, 10659400, 21318800]

約数ペア:

[(1, 21318800), (2, 10659400), (4, 5329700), (5, 4263760), (8, 2664850), (10, 2131880), (16, 1332425), (20, 1065940), (25, 852752), (40, 532970), (50, 426376), (80, 266485), (100, 213188), (200, 106594), (223, 95600), (239, 89200), (400, 53297), (446, 47800), (478, 44600), (892, 23900), (956, 22300), (1115, 19120), (1195, 17840), (1784, 11950), (1912, 11150), (2230, 9560), (2390, 8920), (3568, 5975), (3824, 5575), (4460, 4780)]