21258855

素因数分解:

$3^5\times 5^1\times {\mathrm{17497}}^1$

素因数の和:17517

約数の個数: 24

約数和(自身を含む): 38215632

約数和(自身を除く): 16956777

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 17497, 52491, 87485, 157473, 262455, 472419, 787365, 1417257, 2362095, 4251771, 7086285, 21258855]

約数ペア:

[(1, 21258855), (3, 7086285), (5, 4251771), (9, 2362095), (15, 1417257), (27, 787365), (45, 472419), (81, 262455), (135, 157473), (243, 87485), (405, 52491), (1215, 17497)]