21987120

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^2\times {\mathrm{317}}^1$

素因数の和:367

約数の個数: 120

約数和(自身を含む): 72633744

約数和(自身を除く): 50646624

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 20, 24, 30, 34, 40, 48, 51, 60, 68, 80, 85, 102, 120, 136, 170, 204, 240, 255, 272, 289, 317, 340, 408, 510, 578, 634, 680, 816, 867, 951, 1020, 1156, 1268, 1360, 1445, 1585, 1734, 1902, 2040, 2312, 2536, 2890, 3170, 3468, 3804, 4080, 4335, 4624, 4755, 5072, 5389, 5780, 6340, 6936, 7608, 8670, 9510, 10778, 11560, 12680, 13872, 15216, 16167, 17340, 19020, 21556, 23120, 25360, 26945, 32334, 34680, 38040, 43112, 53890, 64668, 69360, 76080, 80835, 86224, 91613, 107780, 129336, 161670, 183226, 215560, 258672, 274839, 323340, 366452, 431120, 458065, 549678, 646680, 732904, 916130, 1099356, 1293360, 1374195, 1465808, 1832260, 2198712, 2748390, 3664520, 4397424, 5496780, 7329040, 10993560, 21987120]

約数ペア:

[(1, 21987120), (2, 10993560), (3, 7329040), (4, 5496780), (5, 4397424), (6, 3664520), (8, 2748390), (10, 2198712), (12, 1832260), (15, 1465808), (16, 1374195), (17, 1293360), (20, 1099356), (24, 916130), (30, 732904), (34, 646680), (40, 549678), (48, 458065), (51, 431120), (60, 366452), (68, 323340), (80, 274839), (85, 258672), (102, 215560), (120, 183226), (136, 161670), (170, 129336), (204, 107780), (240, 91613), (255, 86224), (272, 80835), (289, 76080), (317, 69360), (340, 64668), (408, 53890), (510, 43112), (578, 38040), (634, 34680), (680, 32334), (816, 26945), (867, 25360), (951, 23120), (1020, 21556), (1156, 19020), (1268, 17340), (1360, 16167), (1445, 15216), (1585, 13872), (1734, 12680), (1902, 11560), (2040, 10778), (2312, 9510), (2536, 8670), (2890, 7608), (3170, 6936), (3468, 6340), (3804, 5780), (4080, 5389), (4335, 5072), (4624, 4755)]