21131369945

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{846779}}^1$

素因数の和:846845

約数の個数: 32

約数和(自身を含む): 31215697920

約数和(自身を除く): 10084327975

約数列:

[1, 5, 7, 23, 31, 35, 115, 155, 161, 217, 713, 805, 1085, 3565, 4991, 24955, 846779, 4233895, 5927453, 19475917, 26250149, 29637265, 97379585, 131250745, 136331419, 183751043, 603753427, 681657095, 918755215, 3018767135, 4226273989, 21131369945]

約数ペア:

[(1, 21131369945), (5, 4226273989), (7, 3018767135), (23, 918755215), (31, 681657095), (35, 603753427), (115, 183751043), (155, 136331419), (161, 131250745), (217, 97379585), (713, 29637265), (805, 26250149), (1085, 19475917), (3565, 5927453), (4991, 4233895), (24955, 846779)]