20724725

素因数分解:

$5^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{271}}^1$

素因数の和:330

約数の個数: 48

約数和(自身を含む): 32378880

約数和(自身を除く): 11654155

約数列:

[1, 5, 7, 19, 23, 25, 35, 95, 115, 133, 161, 175, 271, 437, 475, 575, 665, 805, 1355, 1897, 2185, 3059, 3325, 4025, 5149, 6233, 6775, 9485, 10925, 15295, 25745, 31165, 36043, 43631, 47425, 76475, 118427, 128725, 155825, 180215, 218155, 592135, 828989, 901075, 1090775, 2960675, 4144945, 20724725]

約数ペア:

[(1, 20724725), (5, 4144945), (7, 2960675), (19, 1090775), (23, 901075), (25, 828989), (35, 592135), (95, 218155), (115, 180215), (133, 155825), (161, 128725), (175, 118427), (271, 76475), (437, 47425), (475, 43631), (575, 36043), (665, 31165), (805, 25745), (1355, 15295), (1897, 10925), (2185, 9485), (3059, 6775), (3325, 6233), (4025, 5149)]