21565005

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{18671}}^1$

素因数の和:18697

約数の個数: 32

約数和(自身を含む): 43020288

約数和(自身を除く): 21455283

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 55, 77, 105, 165, 231, 385, 1155, 18671, 56013, 93355, 130697, 205381, 280065, 392091, 616143, 653485, 1026905, 1437667, 1960455, 3080715, 4313001, 7188335, 21565005]

約数ペア:

[(1, 21565005), (3, 7188335), (5, 4313001), (7, 3080715), (11, 1960455), (15, 1437667), (21, 1026905), (33, 653485), (35, 616143), (55, 392091), (77, 280065), (105, 205381), (165, 130697), (231, 93355), (385, 56013), (1155, 18671)]