20961579

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{271}}^1$

素因数の和:375

約数の個数: 32

約数和(自身を含む): 31334400

約数和(自身を除く): 10372821

約数列:

[1, 3, 19, 23, 57, 59, 69, 177, 271, 437, 813, 1121, 1311, 1357, 3363, 4071, 5149, 6233, 15447, 15989, 18699, 25783, 47967, 77349, 118427, 303791, 355281, 367747, 911373, 1103241, 6987193, 20961579]

約数ペア:

[(1, 20961579), (3, 6987193), (19, 1103241), (23, 911373), (57, 367747), (59, 355281), (69, 303791), (177, 118427), (271, 77349), (437, 47967), (813, 25783), (1121, 18699), (1311, 15989), (1357, 15447), (3363, 6233), (4071, 5149)]