18981904

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{17707}}^1$

素因数の和:17782

約数の個数: 20

約数和(自身を含む): 37328464

約数和(自身を除く): 18346560

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 17707, 35414, 70828, 141656, 283312, 1186369, 2372738, 4745476, 9490952, 18981904]

約数ペア:

[(1, 18981904), (2, 9490952), (4, 4745476), (8, 2372738), (16, 1186369), (67, 283312), (134, 141656), (268, 70828), (536, 35414), (1072, 17707)]