21850911

素因数分解:

$3^3\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{257}}^1$

素因数の和:380

約数の個数: 32

約数和(自身を含む): 33684480

約数和(自身を除く): 11833569

約数列:

[1, 3, 9, 27, 47, 67, 141, 201, 257, 423, 603, 771, 1269, 1809, 2313, 3149, 6939, 9447, 12079, 17219, 28341, 36237, 51657, 85023, 108711, 154971, 326133, 464913, 809293, 2427879, 7283637, 21850911]

約数ペア:

[(1, 21850911), (3, 7283637), (9, 2427879), (27, 809293), (47, 464913), (67, 326133), (141, 154971), (201, 108711), (257, 85023), (423, 51657), (603, 36237), (771, 28341), (1269, 17219), (1809, 12079), (2313, 9447), (3149, 6939)]