20965720

素因数分解:

$2^3\times 5^1\times {\mathrm{227}}^1\times {\mathrm{2309}}^1$

素因数の和:2547

約数の個数: 32

約数和(自身を含む): 47401200

約数和(自身を除く): 26435480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 227, 454, 908, 1135, 1816, 2270, 2309, 4540, 4618, 9080, 9236, 11545, 18472, 23090, 46180, 92360, 524143, 1048286, 2096572, 2620715, 4193144, 5241430, 10482860, 20965720]

約数ペア:

[(1, 20965720), (2, 10482860), (4, 5241430), (5, 4193144), (8, 2620715), (10, 2096572), (20, 1048286), (40, 524143), (227, 92360), (454, 46180), (908, 23090), (1135, 18472), (1816, 11545), (2270, 9236), (2309, 9080), (4540, 4618)]