21905955

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{25621}}^1$

素因数の和:25651

約数の個数: 24

約数和(自身を含む): 39970320

約数和(自身を除く): 18064365

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 855, 25621, 76863, 128105, 230589, 384315, 486799, 1152945, 1460397, 2433995, 4381191, 7301985, 21905955]

約数ペア:

[(1, 21905955), (3, 7301985), (5, 4381191), (9, 2433995), (15, 1460397), (19, 1152945), (45, 486799), (57, 384315), (95, 230589), (171, 128105), (285, 76863), (855, 25621)]