21271215

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{173}}^1\times {\mathrm{1171}}^1$

素因数の和:1359

約数の個数: 32

約数和(自身を含む): 39154176

約数和(自身を除く): 17882961

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 173, 519, 865, 1171, 1211, 2595, 3513, 3633, 5855, 6055, 8197, 17565, 18165, 24591, 40985, 122955, 202583, 607749, 1012915, 1418081, 3038745, 4254243, 7090405, 21271215]

約数ペア:

[(1, 21271215), (3, 7090405), (5, 4254243), (7, 3038745), (15, 1418081), (21, 1012915), (35, 607749), (105, 202583), (173, 122955), (519, 40985), (865, 24591), (1171, 18165), (1211, 17565), (2595, 8197), (3513, 6055), (3633, 5855)]