20005575

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{139}}^1$

素因数の和:272

約数の個数: 48

約数和(自身を含む): 35414400

約数和(自身を除く): 15408825

約数列:

[1, 3, 5, 15, 19, 25, 57, 75, 95, 101, 139, 285, 303, 417, 475, 505, 695, 1425, 1515, 1919, 2085, 2525, 2641, 3475, 5757, 7575, 7923, 9595, 10425, 13205, 14039, 28785, 39615, 42117, 47975, 66025, 70195, 143925, 198075, 210585, 266741, 350975, 800223, 1052925, 1333705, 4001115, 6668525, 20005575]

約数ペア:

[(1, 20005575), (3, 6668525), (5, 4001115), (15, 1333705), (19, 1052925), (25, 800223), (57, 350975), (75, 266741), (95, 210585), (101, 198075), (139, 143925), (285, 70195), (303, 66025), (417, 47975), (475, 42117), (505, 39615), (695, 28785), (1425, 14039), (1515, 13205), (1919, 10425), (2085, 9595), (2525, 7923), (2641, 7575), (3475, 5757)]