21240656820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{211}}^1\times {\mathrm{559259}}^1$

素因数の和:559485

約数の個数: 72

約数和(自身を含む): 64735463520

約数和(自身を除く): 43494806700

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 211, 422, 633, 844, 1055, 1266, 1899, 2110, 2532, 3165, 3798, 4220, 6330, 7596, 9495, 12660, 18990, 37980, 559259, 1118518, 1677777, 2237036, 2796295, 3355554, 5033331, 5592590, 6711108, 8388885, 10066662, 11185180, 16777770, 20133324, 25166655, 33555540, 50333310, 100666620, 118003649, 236007298, 354010947, 472014596, 590018245, 708021894, 1062032841, 1180036490, 1416043788, 1770054735, 2124065682, 2360072980, 3540109470, 4248131364, 5310164205, 7080218940, 10620328410, 21240656820]

約数ペア:

[(1, 21240656820), (2, 10620328410), (3, 7080218940), (4, 5310164205), (5, 4248131364), (6, 3540109470), (9, 2360072980), (10, 2124065682), (12, 1770054735), (15, 1416043788), (18, 1180036490), (20, 1062032841), (30, 708021894), (36, 590018245), (45, 472014596), (60, 354010947), (90, 236007298), (180, 118003649), (211, 100666620), (422, 50333310), (633, 33555540), (844, 25166655), (1055, 20133324), (1266, 16777770), (1899, 11185180), (2110, 10066662), (2532, 8388885), (3165, 6711108), (3798, 5592590), (4220, 5033331), (6330, 3355554), (7596, 2796295), (9495, 2237036), (12660, 1677777), (18990, 1118518), (37980, 559259)]