21205235

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{179}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 7306765

約数列:

[1, 5, 19, 29, 43, 95, 145, 179, 215, 551, 817, 895, 1247, 2755, 3401, 4085, 5191, 6235, 7697, 17005, 23693, 25955, 38485, 98629, 118465, 146243, 223213, 493145, 731215, 1116065, 4241047, 21205235]

約数ペア:

[(1, 21205235), (5, 4241047), (19, 1116065), (29, 731215), (43, 493145), (95, 223213), (145, 146243), (179, 118465), (215, 98629), (551, 38485), (817, 25955), (895, 23693), (1247, 17005), (2755, 7697), (3401, 6235), (4085, 5191)]