20448428

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{5107}}^1$

素因数の和:5142

約数の個数: 48

約数和(自身を含む): 48056064

約数和(自身を除く): 27607636

約数列:

[1, 2, 4, 7, 11, 13, 14, 22, 26, 28, 44, 52, 77, 91, 143, 154, 182, 286, 308, 364, 572, 1001, 2002, 4004, 5107, 10214, 20428, 35749, 56177, 66391, 71498, 112354, 132782, 142996, 224708, 265564, 393239, 464737, 730301, 786478, 929474, 1460602, 1572956, 1858948, 2921204, 5112107, 10224214, 20448428]

約数ペア:

[(1, 20448428), (2, 10224214), (4, 5112107), (7, 2921204), (11, 1858948), (13, 1572956), (14, 1460602), (22, 929474), (26, 786478), (28, 730301), (44, 464737), (52, 393239), (77, 265564), (91, 224708), (143, 142996), (154, 132782), (182, 112354), (286, 71498), (308, 66391), (364, 56177), (572, 35749), (1001, 20428), (2002, 10214), (4004, 5107)]