21511420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{8087}}^1$

素因数の和:8122

約数の個数: 48

約数和(自身を含む): 54351360

約数和(自身を除く): 32839940

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 8087, 16174, 32348, 40435, 56609, 80870, 113218, 153653, 161740, 226436, 283045, 307306, 566090, 614612, 768265, 1075571, 1132180, 1536530, 2151142, 3073060, 4302284, 5377855, 10755710, 21511420]

約数ペア:

[(1, 21511420), (2, 10755710), (4, 5377855), (5, 4302284), (7, 3073060), (10, 2151142), (14, 1536530), (19, 1132180), (20, 1075571), (28, 768265), (35, 614612), (38, 566090), (70, 307306), (76, 283045), (95, 226436), (133, 161740), (140, 153653), (190, 113218), (266, 80870), (380, 56609), (532, 40435), (665, 32348), (1330, 16174), (2660, 8087)]