21840560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{907}}^1$

素因数の和:970

約数の個数: 80

約数和(自身を含む): 59448576

約数和(自身を除く): 37608016

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 43, 56, 70, 80, 86, 112, 140, 172, 215, 280, 301, 344, 430, 560, 602, 688, 860, 907, 1204, 1505, 1720, 1814, 2408, 3010, 3440, 3628, 4535, 4816, 6020, 6349, 7256, 9070, 12040, 12698, 14512, 18140, 24080, 25396, 31745, 36280, 39001, 50792, 63490, 72560, 78002, 101584, 126980, 156004, 195005, 253960, 273007, 312008, 390010, 507920, 546014, 624016, 780020, 1092028, 1365035, 1560040, 2184056, 2730070, 3120080, 4368112, 5460140, 10920280, 21840560]

約数ペア:

[(1, 21840560), (2, 10920280), (4, 5460140), (5, 4368112), (7, 3120080), (8, 2730070), (10, 2184056), (14, 1560040), (16, 1365035), (20, 1092028), (28, 780020), (35, 624016), (40, 546014), (43, 507920), (56, 390010), (70, 312008), (80, 273007), (86, 253960), (112, 195005), (140, 156004), (172, 126980), (215, 101584), (280, 78002), (301, 72560), (344, 63490), (430, 50792), (560, 39001), (602, 36280), (688, 31745), (860, 25396), (907, 24080), (1204, 18140), (1505, 14512), (1720, 12698), (1814, 12040), (2408, 9070), (3010, 7256), (3440, 6349), (3628, 6020), (4535, 4816)]