21959420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{1553}}^1$

素因数の和:1670

約数の個数: 48

約数和(自身を含む): 53258688

約数和(自身を除く): 31299268

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 101, 140, 202, 404, 505, 707, 1010, 1414, 1553, 2020, 2828, 3106, 3535, 6212, 7070, 7765, 10871, 14140, 15530, 21742, 31060, 43484, 54355, 108710, 156853, 217420, 313706, 627412, 784265, 1097971, 1568530, 2195942, 3137060, 4391884, 5489855, 10979710, 21959420]

約数ペア:

[(1, 21959420), (2, 10979710), (4, 5489855), (5, 4391884), (7, 3137060), (10, 2195942), (14, 1568530), (20, 1097971), (28, 784265), (35, 627412), (70, 313706), (101, 217420), (140, 156853), (202, 108710), (404, 54355), (505, 43484), (707, 31060), (1010, 21742), (1414, 15530), (1553, 14140), (2020, 10871), (2828, 7765), (3106, 7070), (3535, 6212)]