21909447

素因数分解:

$3^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{2273}}^1$

素因数の和:2309

約数の個数: 40

約数和(自身を含む): 39622176

約数和(自身を除く): 17712729

約数列:

[1, 3, 7, 9, 17, 21, 27, 51, 63, 81, 119, 153, 189, 357, 459, 567, 1071, 1377, 2273, 3213, 6819, 9639, 15911, 20457, 38641, 47733, 61371, 115923, 143199, 184113, 270487, 347769, 429597, 811461, 1043307, 1288791, 2434383, 3129921, 7303149, 21909447]

約数ペア:

[(1, 21909447), (3, 7303149), (7, 3129921), (9, 2434383), (17, 1288791), (21, 1043307), (27, 811461), (51, 429597), (63, 347769), (81, 270487), (119, 184113), (153, 143199), (189, 115923), (357, 61371), (459, 47733), (567, 38641), (1071, 20457), (1377, 15911), (2273, 9639), (3213, 6819)]