20378575

素因数分解:

$5^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:184

約数の個数: 48

約数和(自身を含む): 30998016

約数和(自身を除く): 10619441

約数列:

[1, 5, 7, 23, 25, 35, 61, 83, 115, 161, 175, 305, 415, 427, 575, 581, 805, 1403, 1525, 1909, 2075, 2135, 2905, 4025, 5063, 7015, 9545, 9821, 10675, 13363, 14525, 25315, 35075, 35441, 47725, 49105, 66815, 116449, 126575, 177205, 245525, 334075, 582245, 815143, 886025, 2911225, 4075715, 20378575]

約数ペア:

[(1, 20378575), (5, 4075715), (7, 2911225), (23, 886025), (25, 815143), (35, 582245), (61, 334075), (83, 245525), (115, 177205), (161, 126575), (175, 116449), (305, 66815), (415, 49105), (427, 47725), (575, 35441), (581, 35075), (805, 25315), (1403, 14525), (1525, 13363), (1909, 10675), (2075, 9821), (2135, 9545), (2905, 7015), (4025, 5063)]