21015315

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{9157}}^1$

素因数の和:9188

約数の個数: 32

約数和(自身を含む): 39562560

約数和(自身を除く): 18547245

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 85, 135, 153, 255, 459, 765, 2295, 9157, 27471, 45785, 82413, 137355, 155669, 247239, 412065, 467007, 778345, 1236195, 1401021, 2335035, 4203063, 7005105, 21015315]

約数ペア:

[(1, 21015315), (3, 7005105), (5, 4203063), (9, 2335035), (15, 1401021), (17, 1236195), (27, 778345), (45, 467007), (51, 412065), (85, 247239), (135, 155669), (153, 137355), (255, 82413), (459, 45785), (765, 27471), (2295, 9157)]