21356307

素因数分解:

$3^2\times 7^2\times {\mathrm{79}}^1\times {\mathrm{613}}^1$

素因数の和:712

約数の個数: 36

約数和(自身を含む): 36397920

約数和(自身を除く): 15041613

約数列:

[1, 3, 7, 9, 21, 49, 63, 79, 147, 237, 441, 553, 613, 711, 1659, 1839, 3871, 4291, 4977, 5517, 11613, 12873, 30037, 34839, 38619, 48427, 90111, 145281, 270333, 338989, 435843, 1016967, 2372923, 3050901, 7118769, 21356307]

約数ペア:

[(1, 21356307), (3, 7118769), (7, 3050901), (9, 2372923), (21, 1016967), (49, 435843), (63, 338989), (79, 270333), (147, 145281), (237, 90111), (441, 48427), (553, 38619), (613, 34839), (711, 30037), (1659, 12873), (1839, 11613), (3871, 5517), (4291, 4977)]