20811280

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5309}}^1$

素因数の和:5336

約数の個数: 60

約数和(自身を含む): 56296620

約数和(自身を除く): 35485340

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5309, 10618, 21236, 26545, 37163, 42472, 53090, 74326, 84944, 106180, 148652, 185815, 212360, 260141, 297304, 371630, 424720, 520282, 594608, 743260, 1040564, 1300705, 1486520, 2081128, 2601410, 2973040, 4162256, 5202820, 10405640, 20811280]

約数ペア:

[(1, 20811280), (2, 10405640), (4, 5202820), (5, 4162256), (7, 2973040), (8, 2601410), (10, 2081128), (14, 1486520), (16, 1300705), (20, 1040564), (28, 743260), (35, 594608), (40, 520282), (49, 424720), (56, 371630), (70, 297304), (80, 260141), (98, 212360), (112, 185815), (140, 148652), (196, 106180), (245, 84944), (280, 74326), (392, 53090), (490, 42472), (560, 37163), (784, 26545), (980, 21236), (1960, 10618), (3920, 5309)]