21554505

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{7603}}^1$

素因数の和:7627

約数の個数: 40

約数和(自身を含む): 44164032

約数和(自身を除く): 22609527

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 81, 105, 135, 189, 315, 405, 567, 945, 2835, 7603, 22809, 38015, 53221, 68427, 114045, 159663, 205281, 266105, 342135, 478989, 615843, 798315, 1026405, 1436967, 2394945, 3079215, 4310901, 7184835, 21554505]

約数ペア:

[(1, 21554505), (3, 7184835), (5, 4310901), (7, 3079215), (9, 2394945), (15, 1436967), (21, 1026405), (27, 798315), (35, 615843), (45, 478989), (63, 342135), (81, 266105), (105, 205281), (135, 159663), (189, 114045), (315, 68427), (405, 53221), (567, 38015), (945, 22809), (2835, 7603)]