21065585

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{311}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 28753920

約数和(自身を除く): 7688335

約数列:

[1, 5, 19, 23, 31, 95, 115, 155, 311, 437, 589, 713, 1555, 2185, 2945, 3565, 5909, 7153, 9641, 13547, 29545, 35765, 48205, 67735, 135907, 183179, 221743, 679535, 915895, 1108715, 4213117, 21065585]

約数ペア:

[(1, 21065585), (5, 4213117), (19, 1108715), (23, 915895), (31, 679535), (95, 221743), (115, 183179), (155, 135907), (311, 67735), (437, 48205), (589, 35765), (713, 29545), (1555, 13547), (2185, 9641), (2945, 7153), (3565, 5909)]