280304780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{20641}}^1$

素因数の和:20754

約数の個数: 48

約数和(自身を含む): 679699776

約数和(自身を除く): 399394996

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 97, 140, 194, 388, 485, 679, 970, 1358, 1940, 2716, 3395, 6790, 13580, 20641, 41282, 82564, 103205, 144487, 206410, 288974, 412820, 577948, 722435, 1444870, 2002177, 2889740, 4004354, 8008708, 10010885, 14015239, 20021770, 28030478, 40043540, 56060956, 70076195, 140152390, 280304780]

約数ペア:

[(1, 280304780), (2, 140152390), (4, 70076195), (5, 56060956), (7, 40043540), (10, 28030478), (14, 20021770), (20, 14015239), (28, 10010885), (35, 8008708), (70, 4004354), (97, 2889740), (140, 2002177), (194, 1444870), (388, 722435), (485, 577948), (679, 412820), (970, 288974), (1358, 206410), (1940, 144487), (2716, 103205), (3395, 82564), (6790, 41282), (13580, 20641)]