18891112

素因数分解:

$2^3\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{421}}^1$

素因数の和:577

約数の個数: 32

約数和(自身を含む): 36460800

約数和(自身を除く): 17569688

約数列:

[1, 2, 4, 8, 71, 79, 142, 158, 284, 316, 421, 568, 632, 842, 1684, 3368, 5609, 11218, 22436, 29891, 33259, 44872, 59782, 66518, 119564, 133036, 239128, 266072, 2361389, 4722778, 9445556, 18891112]

約数ペア:

[(1, 18891112), (2, 9445556), (4, 4722778), (8, 2361389), (71, 266072), (79, 239128), (142, 133036), (158, 119564), (284, 66518), (316, 59782), (421, 44872), (568, 33259), (632, 29891), (842, 22436), (1684, 11218), (3368, 5609)]