21255129

素因数分解:

$3^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{1973}}^1$

素因数の和:2011

約数の個数: 40

約数和(自身を含む): 38216640

約数和(自身を除く): 16961511

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 133, 171, 189, 399, 513, 567, 1197, 1539, 1973, 3591, 5919, 10773, 13811, 17757, 37487, 41433, 53271, 112461, 124299, 159813, 262409, 337383, 372897, 787227, 1012149, 1118691, 2361681, 3036447, 7085043, 21255129]

約数ペア:

[(1, 21255129), (3, 7085043), (7, 3036447), (9, 2361681), (19, 1118691), (21, 1012149), (27, 787227), (57, 372897), (63, 337383), (81, 262409), (133, 159813), (171, 124299), (189, 112461), (399, 53271), (513, 41433), (567, 37487), (1197, 17757), (1539, 13811), (1973, 10773), (3591, 5919)]