21263985

素因数分解:

$3^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{5081}}^1$

素因数の和:5126

約数の個数: 32

約数和(自身を含む): 39029760

約数和(自身を除く): 17765775

約数列:

[1, 3, 5, 9, 15, 27, 31, 45, 93, 135, 155, 279, 465, 837, 1395, 4185, 5081, 15243, 25405, 45729, 76215, 137187, 157511, 228645, 472533, 685935, 787555, 1417599, 2362665, 4252797, 7087995, 21263985]

約数ペア:

[(1, 21263985), (3, 7087995), (5, 4252797), (9, 2362665), (15, 1417599), (27, 787555), (31, 685935), (45, 472533), (93, 228645), (135, 157511), (155, 137187), (279, 76215), (465, 45729), (837, 25405), (1395, 15243), (4185, 5081)]