21157680

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{199}}^1\times {\mathrm{443}}^1$

素因数の和:658

約数の個数: 80

約数和(自身を含む): 66067200

約数和(自身を除く): 44909520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 199, 240, 398, 443, 597, 796, 886, 995, 1194, 1329, 1592, 1772, 1990, 2215, 2388, 2658, 2985, 3184, 3544, 3980, 4430, 4776, 5316, 5970, 6645, 7088, 7960, 8860, 9552, 10632, 11940, 13290, 15920, 17720, 21264, 23880, 26580, 35440, 47760, 53160, 88157, 106320, 176314, 264471, 352628, 440785, 528942, 705256, 881570, 1057884, 1322355, 1410512, 1763140, 2115768, 2644710, 3526280, 4231536, 5289420, 7052560, 10578840, 21157680]

約数ペア:

[(1, 21157680), (2, 10578840), (3, 7052560), (4, 5289420), (5, 4231536), (6, 3526280), (8, 2644710), (10, 2115768), (12, 1763140), (15, 1410512), (16, 1322355), (20, 1057884), (24, 881570), (30, 705256), (40, 528942), (48, 440785), (60, 352628), (80, 264471), (120, 176314), (199, 106320), (240, 88157), (398, 53160), (443, 47760), (597, 35440), (796, 26580), (886, 23880), (995, 21264), (1194, 17720), (1329, 15920), (1592, 13290), (1772, 11940), (1990, 10632), (2215, 9552), (2388, 8860), (2658, 7960), (2985, 7088), (3184, 6645), (3544, 5970), (3980, 5316), (4430, 4776)]