21435921

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20357}}^1$

素因数の和:20382

約数の個数: 20

約数和(自身を含む): 34486452

約数和(自身を除く): 13050531

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20357, 61071, 183213, 264641, 549639, 793923, 1648917, 2381769, 7145307, 21435921]

約数ペア:

[(1, 21435921), (3, 7145307), (9, 2381769), (13, 1648917), (27, 793923), (39, 549639), (81, 264641), (117, 183213), (351, 61071), (1053, 20357)]