21016420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61813}}^1$

素因数の和:61839

約数の個数: 24

約数和(自身を含む): 46731384

約数和(自身を除く): 25714964

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 61813, 123626, 247252, 309065, 618130, 1050821, 1236260, 2101642, 4203284, 5254105, 10508210, 21016420]

約数ペア:

[(1, 21016420), (2, 10508210), (4, 5254105), (5, 4203284), (10, 2101642), (17, 1236260), (20, 1050821), (34, 618130), (68, 309065), (85, 247252), (170, 123626), (340, 61813)]