21249795

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{439}}^1\times {\mathrm{461}}^1$

素因数の和:915

約数の個数: 32

約数和(自身を含む): 39029760

約数和(自身を除く): 17779965

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 439, 461, 1317, 1383, 2195, 2305, 3073, 3227, 6585, 6915, 9219, 9681, 15365, 16135, 46095, 48405, 202379, 607137, 1011895, 1416653, 3035685, 4249959, 7083265, 21249795]

約数ペア:

[(1, 21249795), (3, 7083265), (5, 4249959), (7, 3035685), (15, 1416653), (21, 1011895), (35, 607137), (105, 202379), (439, 48405), (461, 46095), (1317, 16135), (1383, 15365), (2195, 9681), (2305, 9219), (3073, 6915), (3227, 6585)]