21261015

素因数分解:

$3^3\times 5^1\times {\mathrm{157489}}^1$

素因数の和:157503

約数の個数: 16

約数和(自身を含む): 37797600

約数和(自身を除く): 16536585

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 157489, 472467, 787445, 1417401, 2362335, 4252203, 7087005, 21261015]

約数ペア:

[(1, 21261015), (3, 7087005), (5, 4252203), (9, 2362335), (15, 1417401), (27, 787445), (45, 472467), (135, 157489)]