21320397

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^2\times {\mathrm{1171}}^1$

素因数の和:1218

約数の個数: 36

約数和(自身を含む): 37419616

約数和(自身を除く): 16099219

約数列:

[1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 289, 357, 867, 1071, 1171, 2023, 2601, 3513, 6069, 8197, 10539, 18207, 19907, 24591, 59721, 73773, 139349, 179163, 338419, 418047, 1015257, 1254141, 2368933, 3045771, 7106799, 21320397]

約数ペア:

[(1, 21320397), (3, 7106799), (7, 3045771), (9, 2368933), (17, 1254141), (21, 1015257), (51, 418047), (63, 338419), (119, 179163), (153, 139349), (289, 73773), (357, 59721), (867, 24591), (1071, 19907), (1171, 18207), (2023, 10539), (2601, 8197), (3513, 6069)]