21855405

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{443}}^1$

素因数の和:498

約数の個数: 64

約数和(自身を含む): 42964992

約数和(自身を除く): 21109587

約数列:

[1, 3, 5, 11, 13, 15, 23, 33, 39, 55, 65, 69, 115, 143, 165, 195, 253, 299, 345, 429, 443, 715, 759, 897, 1265, 1329, 1495, 2145, 2215, 3289, 3795, 4485, 4873, 5759, 6645, 9867, 10189, 14619, 16445, 17277, 24365, 28795, 30567, 49335, 50945, 63349, 73095, 86385, 112079, 132457, 152835, 190047, 316745, 336237, 397371, 560395, 662285, 950235, 1457027, 1681185, 1986855, 4371081, 7285135, 21855405]

約数ペア:

[(1, 21855405), (3, 7285135), (5, 4371081), (11, 1986855), (13, 1681185), (15, 1457027), (23, 950235), (33, 662285), (39, 560395), (55, 397371), (65, 336237), (69, 316745), (115, 190047), (143, 152835), (165, 132457), (195, 112079), (253, 86385), (299, 73095), (345, 63349), (429, 50945), (443, 49335), (715, 30567), (759, 28795), (897, 24365), (1265, 17277), (1329, 16445), (1495, 14619), (2145, 10189), (2215, 9867), (3289, 6645), (3795, 5759), (4485, 4873)]