21478836

素因数分解:

$2^2\times 3^1\times {\mathrm{79}}^1\times {\mathrm{139}}^1\times {\mathrm{163}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 51430400

約数和(自身を除く): 29951564

約数列:

[1, 2, 3, 4, 6, 12, 79, 139, 158, 163, 237, 278, 316, 326, 417, 474, 489, 556, 652, 834, 948, 978, 1668, 1956, 10981, 12877, 21962, 22657, 25754, 32943, 38631, 43924, 45314, 51508, 65886, 67971, 77262, 90628, 131772, 135942, 154524, 271884, 1789903, 3579806, 5369709, 7159612, 10739418, 21478836]

約数ペア:

[(1, 21478836), (2, 10739418), (3, 7159612), (4, 5369709), (6, 3579806), (12, 1789903), (79, 271884), (139, 154524), (158, 135942), (163, 131772), (237, 90628), (278, 77262), (316, 67971), (326, 65886), (417, 51508), (474, 45314), (489, 43924), (556, 38631), (652, 32943), (834, 25754), (948, 22657), (978, 21962), (1668, 12877), (1956, 10981)]