20518288

素因数分解:

$2^4\times 7^1\times {\mathrm{167}}^1\times {\mathrm{1097}}^1$

素因数の和:1279

約数の個数: 40

約数和(自身を含む): 45747072

約数和(自身を除く): 25228784

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 167, 334, 668, 1097, 1169, 1336, 2194, 2338, 2672, 4388, 4676, 7679, 8776, 9352, 15358, 17552, 18704, 30716, 61432, 122864, 183199, 366398, 732796, 1282393, 1465592, 2564786, 2931184, 5129572, 10259144, 20518288]

約数ペア:

[(1, 20518288), (2, 10259144), (4, 5129572), (7, 2931184), (8, 2564786), (14, 1465592), (16, 1282393), (28, 732796), (56, 366398), (112, 183199), (167, 122864), (334, 61432), (668, 30716), (1097, 18704), (1169, 17552), (1336, 15358), (2194, 9352), (2338, 8776), (2672, 7679), (4388, 4676)]