19907312

素因数分解:

$2^4\times {\mathrm{251}}^1\times {\mathrm{4957}}^1$

素因数の和:5216

約数の個数: 20

約数和(自身を含む): 38731896

約数和(自身を除く): 18824584

約数列:

[1, 2, 4, 8, 16, 251, 502, 1004, 2008, 4016, 4957, 9914, 19828, 39656, 79312, 1244207, 2488414, 4976828, 9953656, 19907312]

約数ペア:

[(1, 19907312), (2, 9953656), (4, 4976828), (8, 2488414), (16, 1244207), (251, 79312), (502, 39656), (1004, 19828), (2008, 9914), (4016, 4957)]