21618555

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{439}}^1$

素因数の和:528

約数の個数: 48

約数和(自身を含む): 40930560

約数和(自身を除く): 19312005

約数列:

[1, 3, 5, 7, 15, 21, 35, 49, 67, 105, 147, 201, 245, 335, 439, 469, 735, 1005, 1317, 1407, 2195, 2345, 3073, 3283, 6585, 7035, 9219, 9849, 15365, 16415, 21511, 29413, 46095, 49245, 64533, 88239, 107555, 147065, 205891, 322665, 441195, 617673, 1029455, 1441237, 3088365, 4323711, 7206185, 21618555]

約数ペア:

[(1, 21618555), (3, 7206185), (5, 4323711), (7, 3088365), (15, 1441237), (21, 1029455), (35, 617673), (49, 441195), (67, 322665), (105, 205891), (147, 147065), (201, 107555), (245, 88239), (335, 64533), (439, 49245), (469, 46095), (735, 29413), (1005, 21511), (1317, 16415), (1407, 15365), (2195, 9849), (2345, 9219), (3073, 7035), (3283, 6585)]