21319228

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{17707}}^1$

素因数の和:17761

約数の個数: 24

約数和(自身を含む): 43632512

約数和(自身を除く): 22313284

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 172, 301, 602, 1204, 17707, 35414, 70828, 123949, 247898, 495796, 761401, 1522802, 3045604, 5329807, 10659614, 21319228]

約数ペア:

[(1, 21319228), (2, 10659614), (4, 5329807), (7, 3045604), (14, 1522802), (28, 761401), (43, 495796), (86, 247898), (172, 123949), (301, 70828), (602, 35414), (1204, 17707)]