21257520

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{3851}}^1$

素因数の和:3890

約数の個数: 80

約数和(自身を含む): 68781312

約数和(自身を除く): 47523792

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 30, 40, 46, 48, 60, 69, 80, 92, 115, 120, 138, 184, 230, 240, 276, 345, 368, 460, 552, 690, 920, 1104, 1380, 1840, 2760, 3851, 5520, 7702, 11553, 15404, 19255, 23106, 30808, 38510, 46212, 57765, 61616, 77020, 88573, 92424, 115530, 154040, 177146, 184848, 231060, 265719, 308080, 354292, 442865, 462120, 531438, 708584, 885730, 924240, 1062876, 1328595, 1417168, 1771460, 2125752, 2657190, 3542920, 4251504, 5314380, 7085840, 10628760, 21257520]

約数ペア:

[(1, 21257520), (2, 10628760), (3, 7085840), (4, 5314380), (5, 4251504), (6, 3542920), (8, 2657190), (10, 2125752), (12, 1771460), (15, 1417168), (16, 1328595), (20, 1062876), (23, 924240), (24, 885730), (30, 708584), (40, 531438), (46, 462120), (48, 442865), (60, 354292), (69, 308080), (80, 265719), (92, 231060), (115, 184848), (120, 177146), (138, 154040), (184, 115530), (230, 92424), (240, 88573), (276, 77020), (345, 61616), (368, 57765), (460, 46212), (552, 38510), (690, 30808), (920, 23106), (1104, 19255), (1380, 15404), (1840, 11553), (2760, 7702), (3851, 5520)]