21515040

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{223}}^1$

素因数の和:311

約数の個数: 144

約数和(自身を含む): 74850048

約数和(自身を除く): 53335008

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 60, 67, 72, 80, 90, 96, 120, 134, 144, 160, 180, 201, 223, 240, 268, 288, 335, 360, 402, 446, 480, 536, 603, 669, 670, 720, 804, 892, 1005, 1072, 1115, 1206, 1338, 1340, 1440, 1608, 1784, 2007, 2010, 2144, 2230, 2412, 2676, 2680, 3015, 3216, 3345, 3568, 4014, 4020, 4460, 4824, 5352, 5360, 6030, 6432, 6690, 7136, 8028, 8040, 8920, 9648, 10035, 10704, 10720, 12060, 13380, 14941, 16056, 16080, 17840, 19296, 20070, 21408, 24120, 26760, 29882, 32112, 32160, 35680, 40140, 44823, 48240, 53520, 59764, 64224, 74705, 80280, 89646, 96480, 107040, 119528, 134469, 149410, 160560, 179292, 224115, 239056, 268938, 298820, 321120, 358584, 448230, 478112, 537876, 597640, 672345, 717168, 896460, 1075752, 1195280, 1344690, 1434336, 1792920, 2151504, 2390560, 2689380, 3585840, 4303008, 5378760, 7171680, 10757520, 21515040]

約数ペア:

[(1, 21515040), (2, 10757520), (3, 7171680), (4, 5378760), (5, 4303008), (6, 3585840), (8, 2689380), (9, 2390560), (10, 2151504), (12, 1792920), (15, 1434336), (16, 1344690), (18, 1195280), (20, 1075752), (24, 896460), (30, 717168), (32, 672345), (36, 597640), (40, 537876), (45, 478112), (48, 448230), (60, 358584), (67, 321120), (72, 298820), (80, 268938), (90, 239056), (96, 224115), (120, 179292), (134, 160560), (144, 149410), (160, 134469), (180, 119528), (201, 107040), (223, 96480), (240, 89646), (268, 80280), (288, 74705), (335, 64224), (360, 59764), (402, 53520), (446, 48240), (480, 44823), (536, 40140), (603, 35680), (669, 32160), (670, 32112), (720, 29882), (804, 26760), (892, 24120), (1005, 21408), (1072, 20070), (1115, 19296), (1206, 17840), (1338, 16080), (1340, 16056), (1440, 14941), (1608, 13380), (1784, 12060), (2007, 10720), (2010, 10704), (2144, 10035), (2230, 9648), (2412, 8920), (2676, 8040), (2680, 8028), (3015, 7136), (3216, 6690), (3345, 6432), (3568, 6030), (4014, 5360), (4020, 5352), (4460, 4824)]