211778825

素因数分解:

$5^2\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{109}}^2$

素因数の和:282

約数の個数: 36

約数和(自身を含む): 285481728

約数和(自身を除く): 73702903

約数列:

[1, 5, 23, 25, 31, 109, 115, 155, 545, 575, 713, 775, 2507, 2725, 3379, 3565, 11881, 12535, 16895, 17825, 59405, 62675, 77717, 84475, 273263, 297025, 368311, 388585, 1366315, 1841555, 1942925, 6831575, 8471153, 9207775, 42355765, 211778825]

約数ペア:

[(1, 211778825), (5, 42355765), (23, 9207775), (25, 8471153), (31, 6831575), (109, 1942925), (115, 1841555), (155, 1366315), (545, 388585), (575, 368311), (713, 297025), (775, 273263), (2507, 84475), (2725, 77717), (3379, 62675), (3565, 59405), (11881, 17825), (12535, 16895)]