21221228

素因数分解:

$2^2\times 7^1\times {\mathrm{509}}^1\times {\mathrm{1489}}^1$

素因数の和:2009

約数の個数: 24

約数和(自身を含む): 42554400

約数和(自身を除く): 21333172

約数列:

[1, 2, 4, 7, 14, 28, 509, 1018, 1489, 2036, 2978, 3563, 5956, 7126, 10423, 14252, 20846, 41692, 757901, 1515802, 3031604, 5305307, 10610614, 21221228]

約数ペア:

[(1, 21221228), (2, 10610614), (4, 5305307), (7, 3031604), (14, 1515802), (28, 757901), (509, 41692), (1018, 20846), (1489, 14252), (2036, 10423), (2978, 7126), (3563, 5956)]