21056412

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^2\times {\mathrm{73}}^1$

素因数の和:179

約数の個数: 72

約数和(自身を含む): 54912144

約数和(自身を除く): 33855732

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 43, 52, 73, 78, 86, 129, 146, 156, 172, 219, 258, 292, 438, 516, 559, 876, 949, 1118, 1677, 1849, 1898, 2236, 2847, 3139, 3354, 3698, 3796, 5547, 5694, 6278, 6708, 7396, 9417, 11094, 11388, 12556, 18834, 22188, 24037, 37668, 40807, 48074, 72111, 81614, 96148, 122421, 134977, 144222, 163228, 244842, 269954, 288444, 404931, 489684, 539908, 809862, 1619724, 1754701, 3509402, 5264103, 7018804, 10528206, 21056412]

約数ペア:

[(1, 21056412), (2, 10528206), (3, 7018804), (4, 5264103), (6, 3509402), (12, 1754701), (13, 1619724), (26, 809862), (39, 539908), (43, 489684), (52, 404931), (73, 288444), (78, 269954), (86, 244842), (129, 163228), (146, 144222), (156, 134977), (172, 122421), (219, 96148), (258, 81614), (292, 72111), (438, 48074), (516, 40807), (559, 37668), (876, 24037), (949, 22188), (1118, 18834), (1677, 12556), (1849, 11388), (1898, 11094), (2236, 9417), (2847, 7396), (3139, 6708), (3354, 6278), (3698, 5694), (3796, 5547)]