21955131

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{601}}^1$

素因数の和:665

約数の個数: 40

約数和(自身を含む): 36712368

約数和(自身を除く): 14757237

約数列:

[1, 3, 9, 11, 27, 33, 41, 81, 99, 123, 297, 369, 451, 601, 891, 1107, 1353, 1803, 3321, 4059, 5409, 6611, 12177, 16227, 19833, 24641, 36531, 48681, 59499, 73923, 178497, 221769, 271051, 535491, 665307, 813153, 1995921, 2439459, 7318377, 21955131]

約数ペア:

[(1, 21955131), (3, 7318377), (9, 2439459), (11, 1995921), (27, 813153), (33, 665307), (41, 535491), (81, 271051), (99, 221769), (123, 178497), (297, 73923), (369, 59499), (451, 48681), (601, 36531), (891, 24641), (1107, 19833), (1353, 16227), (1803, 12177), (3321, 6611), (4059, 5409)]