21720200

素因数分解:

$2^3\times 5^2\times {\mathrm{223}}^1\times {\mathrm{487}}^1$

素因数の和:726

約数の個数: 48

約数和(自身を含む): 50830080

約数和(自身を除く): 29109880

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 223, 446, 487, 892, 974, 1115, 1784, 1948, 2230, 2435, 3896, 4460, 4870, 5575, 8920, 9740, 11150, 12175, 19480, 22300, 24350, 44600, 48700, 97400, 108601, 217202, 434404, 543005, 868808, 1086010, 2172020, 2715025, 4344040, 5430050, 10860100, 21720200]

約数ペア:

[(1, 21720200), (2, 10860100), (4, 5430050), (5, 4344040), (8, 2715025), (10, 2172020), (20, 1086010), (25, 868808), (40, 543005), (50, 434404), (100, 217202), (200, 108601), (223, 97400), (446, 48700), (487, 44600), (892, 24350), (974, 22300), (1115, 19480), (1784, 12175), (1948, 11150), (2230, 9740), (2435, 8920), (3896, 5575), (4460, 4870)]