20931240

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{157}}^1$

素因数の和:283

約数の個数: 128

約数和(自身を含む): 69621120

約数和(自身を除く): 48689880

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 33, 40, 44, 55, 60, 66, 88, 101, 110, 120, 132, 157, 165, 202, 220, 264, 303, 314, 330, 404, 440, 471, 505, 606, 628, 660, 785, 808, 942, 1010, 1111, 1212, 1256, 1320, 1515, 1570, 1727, 1884, 2020, 2222, 2355, 2424, 3030, 3140, 3333, 3454, 3768, 4040, 4444, 4710, 5181, 5555, 6060, 6280, 6666, 6908, 8635, 8888, 9420, 10362, 11110, 12120, 13332, 13816, 15857, 16665, 17270, 18840, 20724, 22220, 25905, 26664, 31714, 33330, 34540, 41448, 44440, 47571, 51810, 63428, 66660, 69080, 79285, 95142, 103620, 126856, 133320, 158570, 174427, 190284, 207240, 237855, 317140, 348854, 380568, 475710, 523281, 634280, 697708, 872135, 951420, 1046562, 1395416, 1744270, 1902840, 2093124, 2616405, 3488540, 4186248, 5232810, 6977080, 10465620, 20931240]

約数ペア:

[(1, 20931240), (2, 10465620), (3, 6977080), (4, 5232810), (5, 4186248), (6, 3488540), (8, 2616405), (10, 2093124), (11, 1902840), (12, 1744270), (15, 1395416), (20, 1046562), (22, 951420), (24, 872135), (30, 697708), (33, 634280), (40, 523281), (44, 475710), (55, 380568), (60, 348854), (66, 317140), (88, 237855), (101, 207240), (110, 190284), (120, 174427), (132, 158570), (157, 133320), (165, 126856), (202, 103620), (220, 95142), (264, 79285), (303, 69080), (314, 66660), (330, 63428), (404, 51810), (440, 47571), (471, 44440), (505, 41448), (606, 34540), (628, 33330), (660, 31714), (785, 26664), (808, 25905), (942, 22220), (1010, 20724), (1111, 18840), (1212, 17270), (1256, 16665), (1320, 15857), (1515, 13816), (1570, 13332), (1727, 12120), (1884, 11110), (2020, 10362), (2222, 9420), (2355, 8888), (2424, 8635), (3030, 6908), (3140, 6666), (3333, 6280), (3454, 6060), (3768, 5555), (4040, 5181), (4444, 4710)]