19908280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{733}}^1$

素因数の和:848

約数の個数: 64

約数和(自身を含む): 51791040

約数和(自身を除く): 31882760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 97, 140, 194, 280, 388, 485, 679, 733, 776, 970, 1358, 1466, 1940, 2716, 2932, 3395, 3665, 3880, 5131, 5432, 5864, 6790, 7330, 10262, 13580, 14660, 20524, 25655, 27160, 29320, 41048, 51310, 71101, 102620, 142202, 205240, 284404, 355505, 497707, 568808, 711010, 995414, 1422020, 1990828, 2488535, 2844040, 3981656, 4977070, 9954140, 19908280]

約数ペア:

[(1, 19908280), (2, 9954140), (4, 4977070), (5, 3981656), (7, 2844040), (8, 2488535), (10, 1990828), (14, 1422020), (20, 995414), (28, 711010), (35, 568808), (40, 497707), (56, 355505), (70, 284404), (97, 205240), (140, 142202), (194, 102620), (280, 71101), (388, 51310), (485, 41048), (679, 29320), (733, 27160), (776, 25655), (970, 20524), (1358, 14660), (1466, 13580), (1940, 10262), (2716, 7330), (2932, 6790), (3395, 5864), (3665, 5432), (3880, 5131)]