21827799

素因数分解:

$3^4\times 7^1\times {\mathrm{137}}^1\times {\mathrm{281}}^1$

素因数の和:437

約数の個数: 40

約数和(自身を含む): 37670688

約数和(自身を除く): 15842889

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 137, 189, 281, 411, 567, 843, 959, 1233, 1967, 2529, 2877, 3699, 5901, 7587, 8631, 11097, 17703, 22761, 25893, 38497, 53109, 77679, 115491, 159327, 269479, 346473, 808437, 1039419, 2425311, 3118257, 7275933, 21827799]

約数ペア:

[(1, 21827799), (3, 7275933), (7, 3118257), (9, 2425311), (21, 1039419), (27, 808437), (63, 346473), (81, 269479), (137, 159327), (189, 115491), (281, 77679), (411, 53109), (567, 38497), (843, 25893), (959, 22761), (1233, 17703), (1967, 11097), (2529, 8631), (2877, 7587), (3699, 5901)]