21151145

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{349}}^1$

素因数の和:425

約数の個数: 32

約数和(自身を含む): 29030400

約数和(自身を除く): 7879255

約数列:

[1, 5, 17, 23, 31, 85, 115, 155, 349, 391, 527, 713, 1745, 1955, 2635, 3565, 5933, 8027, 10819, 12121, 29665, 40135, 54095, 60605, 136459, 183923, 248837, 682295, 919615, 1244185, 4230229, 21151145]

約数ペア:

[(1, 21151145), (5, 4230229), (17, 1244185), (23, 919615), (31, 682295), (85, 248837), (115, 183923), (155, 136459), (349, 60605), (391, 54095), (527, 40135), (713, 29665), (1745, 12121), (1955, 10819), (2635, 8027), (3565, 5933)]