20939653

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:205

約数の個数: 32

約数和(自身を含む): 26784000

約数和(自身を除く): 5844347

約数列:

[1, 7, 19, 29, 61, 89, 133, 203, 427, 551, 623, 1159, 1691, 1769, 2581, 3857, 5429, 8113, 11837, 12383, 18067, 33611, 38003, 49039, 103151, 157441, 235277, 343273, 722057, 1102087, 2991379, 20939653]

約数ペア:

[(1, 20939653), (7, 2991379), (19, 1102087), (29, 722057), (61, 343273), (89, 235277), (133, 157441), (203, 103151), (427, 49039), (551, 38003), (623, 33611), (1159, 18067), (1691, 12383), (1769, 11837), (2581, 8113), (3857, 5429)]