21019888

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77279}}^1$

素因数の和:77304

約数の個数: 20

約数和(自身を含む): 43122240

約数和(自身を除く): 22102352

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77279, 154558, 309116, 618232, 1236464, 1313743, 2627486, 5254972, 10509944, 21019888]

約数ペア:

[(1, 21019888), (2, 10509944), (4, 5254972), (8, 2627486), (16, 1313743), (17, 1236464), (34, 618232), (68, 309116), (136, 154558), (272, 77279)]