20861575

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{73}}^1$

素因数の和:184

約数の個数: 48

約数和(自身を含む): 31712256

約数和(自身を除く): 10850681

約数列:

[1, 5, 7, 23, 25, 35, 71, 73, 115, 161, 175, 355, 365, 497, 511, 575, 805, 1633, 1679, 1775, 1825, 2485, 2555, 4025, 5183, 8165, 8395, 11431, 11753, 12425, 12775, 25915, 36281, 40825, 41975, 57155, 58765, 119209, 129575, 181405, 285775, 293825, 596045, 834463, 907025, 2980225, 4172315, 20861575]

約数ペア:

[(1, 20861575), (5, 4172315), (7, 2980225), (23, 907025), (25, 834463), (35, 596045), (71, 293825), (73, 285775), (115, 181405), (161, 129575), (175, 119209), (355, 58765), (365, 57155), (497, 41975), (511, 40825), (575, 36281), (805, 25915), (1633, 12775), (1679, 12425), (1775, 11753), (1825, 11431), (2485, 8395), (2555, 8165), (4025, 5183)]