21440540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2377}}^1$

素因数の和:2438

約数の個数: 48

約数和(自身を含む): 50337504

約数和(自身を除く): 28896964

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2255, 2377, 4510, 4754, 9020, 9508, 11885, 23770, 26147, 47540, 52294, 97457, 104588, 130735, 194914, 261470, 389828, 487285, 522940, 974570, 1072027, 1949140, 2144054, 4288108, 5360135, 10720270, 21440540]

約数ペア:

[(1, 21440540), (2, 10720270), (4, 5360135), (5, 4288108), (10, 2144054), (11, 1949140), (20, 1072027), (22, 974570), (41, 522940), (44, 487285), (55, 389828), (82, 261470), (110, 194914), (164, 130735), (205, 104588), (220, 97457), (410, 52294), (451, 47540), (820, 26147), (902, 23770), (1804, 11885), (2255, 9508), (2377, 9020), (4510, 4754)]