31780225

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:154

約数の個数: 48

約数和(自身を含む): 44782848

約数和(自身を除く): 13002623

約数列:

[1, 5, 17, 25, 37, 43, 47, 85, 185, 215, 235, 425, 629, 731, 799, 925, 1075, 1175, 1591, 1739, 2021, 3145, 3655, 3995, 7955, 8695, 10105, 15725, 18275, 19975, 27047, 29563, 34357, 39775, 43475, 50525, 74777, 135235, 147815, 171785, 373885, 676175, 739075, 858925, 1271209, 1869425, 6356045, 31780225]

約数ペア:

[(1, 31780225), (5, 6356045), (17, 1869425), (25, 1271209), (37, 858925), (43, 739075), (47, 676175), (85, 373885), (185, 171785), (215, 147815), (235, 135235), (425, 74777), (629, 50525), (731, 43475), (799, 39775), (925, 34357), (1075, 29563), (1175, 27047), (1591, 19975), (1739, 18275), (2021, 15725), (3145, 10105), (3655, 8695), (3995, 7955)]