20980025

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1$

素因数の和:182

約数の個数: 48

約数和(自身を含む): 30855168

約数和(自身を除く): 9875143

約数列:

[1, 5, 11, 23, 25, 31, 55, 107, 115, 155, 253, 275, 341, 535, 575, 713, 775, 1177, 1265, 1705, 2461, 2675, 3317, 3565, 5885, 6325, 7843, 8525, 12305, 16585, 17825, 27071, 29425, 36487, 39215, 61525, 76291, 82925, 135355, 182435, 196075, 381455, 676775, 839201, 912175, 1907275, 4196005, 20980025]

約数ペア:

[(1, 20980025), (5, 4196005), (11, 1907275), (23, 912175), (25, 839201), (31, 676775), (55, 381455), (107, 196075), (115, 182435), (155, 135355), (253, 82925), (275, 76291), (341, 61525), (535, 39215), (575, 36487), (713, 29425), (775, 27071), (1177, 17825), (1265, 16585), (1705, 12305), (2461, 8525), (2675, 7843), (3317, 6325), (3565, 5885)]