21813813

素因数分解:

$3^3\times 7^1\times {\mathrm{211}}^1\times {\mathrm{547}}^1$

素因数の和:774

約数の個数: 32

約数和(自身を含む): 37176320

約数和(自身を除く): 15362507

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 211, 547, 633, 1477, 1641, 1899, 3829, 4431, 4923, 5697, 11487, 13293, 14769, 34461, 39879, 103383, 115417, 346251, 807919, 1038753, 2423757, 3116259, 7271271, 21813813]

約数ペア:

[(1, 21813813), (3, 7271271), (7, 3116259), (9, 2423757), (21, 1038753), (27, 807919), (63, 346251), (189, 115417), (211, 103383), (547, 39879), (633, 34461), (1477, 14769), (1641, 13293), (1899, 11487), (3829, 5697), (4431, 4923)]