21687183

素因数分解:

$3^4\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1663}}^1$

素因数の和:1705

約数の個数: 40

約数和(自身を含む): 38658048

約数和(自身を除く): 16970865

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 81, 161, 189, 207, 483, 567, 621, 1449, 1663, 1863, 4347, 4989, 11641, 13041, 14967, 34923, 38249, 44901, 104769, 114747, 134703, 267743, 314307, 344241, 803229, 942921, 1032723, 2409687, 3098169, 7229061, 21687183]

約数ペア:

[(1, 21687183), (3, 7229061), (7, 3098169), (9, 2409687), (21, 1032723), (23, 942921), (27, 803229), (63, 344241), (69, 314307), (81, 267743), (161, 134703), (189, 114747), (207, 104769), (483, 44901), (567, 38249), (621, 34923), (1449, 14967), (1663, 13041), (1863, 11641), (4347, 4989)]