21268305

素因数分解:

$3^3\times 5^1\times {\mathrm{157543}}^1$

素因数の和:157557

約数の個数: 16

約数和(自身を含む): 37810560

約数和(自身を除く): 16542255

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157543, 472629, 787715, 1417887, 2363145, 4253661, 7089435, 21268305]

約数ペア:

[(1, 21268305), (3, 7089435), (5, 4253661), (9, 2363145), (15, 1417887), (27, 787715), (45, 472629), (135, 157543)]