21106580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{197}}^1\times {\mathrm{487}}^1$

素因数の和:704

約数の個数: 48

約数和(自身を含む): 48698496

約数和(自身を除く): 27591916

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 197, 220, 394, 487, 788, 974, 985, 1948, 1970, 2167, 2435, 3940, 4334, 4870, 5357, 8668, 9740, 10714, 10835, 21428, 21670, 26785, 43340, 53570, 95939, 107140, 191878, 383756, 479695, 959390, 1055329, 1918780, 2110658, 4221316, 5276645, 10553290, 21106580]

約数ペア:

[(1, 21106580), (2, 10553290), (4, 5276645), (5, 4221316), (10, 2110658), (11, 1918780), (20, 1055329), (22, 959390), (44, 479695), (55, 383756), (110, 191878), (197, 107140), (220, 95939), (394, 53570), (487, 43340), (788, 26785), (974, 21670), (985, 21428), (1948, 10835), (1970, 10714), (2167, 9740), (2435, 8668), (3940, 5357), (4334, 4870)]