21720504

素因数分解:

$2^3\times 3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{1619}}^1$

素因数の和:1684

約数の個数: 64

約数和(自身を含む): 59875200

約数和(自身を除く): 38154696

約数列:

[1, 2, 3, 4, 6, 8, 12, 13, 24, 26, 39, 43, 52, 78, 86, 104, 129, 156, 172, 258, 312, 344, 516, 559, 1032, 1118, 1619, 1677, 2236, 3238, 3354, 4472, 4857, 6476, 6708, 9714, 12952, 13416, 19428, 21047, 38856, 42094, 63141, 69617, 84188, 126282, 139234, 168376, 208851, 252564, 278468, 417702, 505128, 556936, 835404, 905021, 1670808, 1810042, 2715063, 3620084, 5430126, 7240168, 10860252, 21720504]

約数ペア:

[(1, 21720504), (2, 10860252), (3, 7240168), (4, 5430126), (6, 3620084), (8, 2715063), (12, 1810042), (13, 1670808), (24, 905021), (26, 835404), (39, 556936), (43, 505128), (52, 417702), (78, 278468), (86, 252564), (104, 208851), (129, 168376), (156, 139234), (172, 126282), (258, 84188), (312, 69617), (344, 63141), (516, 42094), (559, 38856), (1032, 21047), (1118, 19428), (1619, 13416), (1677, 12952), (2236, 9714), (3238, 6708), (3354, 6476), (4472, 4857)]