21977988

素因数分解:

$2^2\times 3^1\times {\mathrm{43}}^1\times {\mathrm{191}}^1\times {\mathrm{223}}^1$

素因数の和:464

約数の個数: 48

約数和(自身を含む): 52985856

約数和(自身を除く): 31007868

約数列:

[1, 2, 3, 4, 6, 12, 43, 86, 129, 172, 191, 223, 258, 382, 446, 516, 573, 669, 764, 892, 1146, 1338, 2292, 2676, 8213, 9589, 16426, 19178, 24639, 28767, 32852, 38356, 42593, 49278, 57534, 85186, 98556, 115068, 127779, 170372, 255558, 511116, 1831499, 3662998, 5494497, 7325996, 10988994, 21977988]

約数ペア:

[(1, 21977988), (2, 10988994), (3, 7325996), (4, 5494497), (6, 3662998), (12, 1831499), (43, 511116), (86, 255558), (129, 170372), (172, 127779), (191, 115068), (223, 98556), (258, 85186), (382, 57534), (446, 49278), (516, 42593), (573, 38356), (669, 32852), (764, 28767), (892, 24639), (1146, 19178), (1338, 16426), (2292, 9589), (2676, 8213)]