20557131

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{647}}^1$

素因数の和:763

約数の個数: 32

約数和(自身を含む): 33592320

約数和(自身を除く): 13035189

約数列:

[1, 3, 7, 17, 21, 51, 89, 119, 267, 357, 623, 647, 1513, 1869, 1941, 4529, 4539, 10591, 10999, 13587, 31773, 32997, 57583, 76993, 172749, 230979, 403081, 978911, 1209243, 2936733, 6852377, 20557131]

約数ペア:

[(1, 20557131), (3, 6852377), (7, 2936733), (17, 1209243), (21, 978911), (51, 403081), (89, 230979), (119, 172749), (267, 76993), (357, 57583), (623, 32997), (647, 31773), (1513, 13587), (1869, 10999), (1941, 10591), (4529, 4539)]