21378868

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{373}}^1$

素因数の和:496

約数の個数: 48

約数和(自身を含む): 45239040

約数和(自身を除く): 23860172

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 89, 92, 161, 178, 322, 356, 373, 623, 644, 746, 1246, 1492, 2047, 2492, 2611, 4094, 5222, 8188, 8579, 10444, 14329, 17158, 28658, 33197, 34316, 57316, 60053, 66394, 120106, 132788, 232379, 240212, 464758, 763531, 929516, 1527062, 3054124, 5344717, 10689434, 21378868]

約数ペア:

[(1, 21378868), (2, 10689434), (4, 5344717), (7, 3054124), (14, 1527062), (23, 929516), (28, 763531), (46, 464758), (89, 240212), (92, 232379), (161, 132788), (178, 120106), (322, 66394), (356, 60053), (373, 57316), (623, 34316), (644, 33197), (746, 28658), (1246, 17158), (1492, 14329), (2047, 10444), (2492, 8579), (2611, 8188), (4094, 5222)]