20961425

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:138

約数の個数: 48

約数和(自身を含む): 29855232

約数和(自身を除く): 8893807

約数列:

[1, 5, 17, 25, 31, 37, 43, 85, 155, 185, 215, 425, 527, 629, 731, 775, 925, 1075, 1147, 1333, 1591, 2635, 3145, 3655, 5735, 6665, 7955, 13175, 15725, 18275, 19499, 22661, 27047, 28675, 33325, 39775, 49321, 97495, 113305, 135235, 246605, 487475, 566525, 676175, 838457, 1233025, 4192285, 20961425]

約数ペア:

[(1, 20961425), (5, 4192285), (17, 1233025), (25, 838457), (31, 676175), (37, 566525), (43, 487475), (85, 246605), (155, 135235), (185, 113305), (215, 97495), (425, 49321), (527, 39775), (629, 33325), (731, 28675), (775, 27047), (925, 22661), (1075, 19499), (1147, 18275), (1333, 15725), (1591, 13175), (2635, 7955), (3145, 6665), (3655, 5735)]