19901992

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{9833}}^1$

素因数の和:9873

約数の個数: 32

約数和(自身を含む): 42482880

約数和(自身を除く): 22580888

約数列:

[1, 2, 4, 8, 11, 22, 23, 44, 46, 88, 92, 184, 253, 506, 1012, 2024, 9833, 19666, 39332, 78664, 108163, 216326, 226159, 432652, 452318, 865304, 904636, 1809272, 2487749, 4975498, 9950996, 19901992]

約数ペア:

[(1, 19901992), (2, 9950996), (4, 4975498), (8, 2487749), (11, 1809272), (22, 904636), (23, 865304), (44, 452318), (46, 432652), (88, 226159), (92, 216326), (184, 108163), (253, 78664), (506, 39332), (1012, 19666), (2024, 9833)]