21888295

素因数分解:

$5^1\times {\mathrm{11}}^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1$

素因数の和:85

約数の個数: 40

約数和(自身を含む): 32467680

約数和(自身を除く): 10579385

約数列:

[1, 5, 11, 13, 23, 55, 65, 115, 121, 143, 253, 299, 605, 715, 1265, 1331, 1495, 1573, 2783, 3289, 6655, 7865, 13915, 14641, 16445, 17303, 30613, 36179, 73205, 86515, 153065, 180895, 190333, 336743, 397969, 951665, 1683715, 1989845, 4377659, 21888295]

約数ペア:

[(1, 21888295), (5, 4377659), (11, 1989845), (13, 1683715), (23, 951665), (55, 397969), (65, 336743), (115, 190333), (121, 180895), (143, 153065), (253, 86515), (299, 73205), (605, 36179), (715, 30613), (1265, 17303), (1331, 16445), (1495, 14641), (1573, 13915), (2783, 7865), (3289, 6655)]