21817917

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{521}}^1$

素因数の和:591

約数の個数: 40

約数和(自身を含む): 36381312

約数和(自身を除く): 14563395

約数列:

[1, 3, 9, 11, 27, 33, 47, 81, 99, 141, 297, 423, 517, 521, 891, 1269, 1551, 1563, 3807, 4653, 4689, 5731, 13959, 14067, 17193, 24487, 41877, 42201, 51579, 73461, 154737, 220383, 269357, 464211, 661149, 808071, 1983447, 2424213, 7272639, 21817917]

約数ペア:

[(1, 21817917), (3, 7272639), (9, 2424213), (11, 1983447), (27, 808071), (33, 661149), (47, 464211), (81, 269357), (99, 220383), (141, 154737), (297, 73461), (423, 51579), (517, 42201), (521, 41877), (891, 24487), (1269, 17193), (1551, 14067), (1563, 13959), (3807, 5731), (4653, 4689)]