21244720

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{643}}^1$

素因数の和:722

約数の個数: 80

約数和(自身を含む): 57496320

約数和(自身を除く): 36251600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 59, 70, 80, 112, 118, 140, 236, 280, 295, 413, 472, 560, 590, 643, 826, 944, 1180, 1286, 1652, 2065, 2360, 2572, 3215, 3304, 4130, 4501, 4720, 5144, 6430, 6608, 8260, 9002, 10288, 12860, 16520, 18004, 22505, 25720, 33040, 36008, 37937, 45010, 51440, 72016, 75874, 90020, 151748, 180040, 189685, 265559, 303496, 360080, 379370, 531118, 606992, 758740, 1062236, 1327795, 1517480, 2124472, 2655590, 3034960, 4248944, 5311180, 10622360, 21244720]

約数ペア:

[(1, 21244720), (2, 10622360), (4, 5311180), (5, 4248944), (7, 3034960), (8, 2655590), (10, 2124472), (14, 1517480), (16, 1327795), (20, 1062236), (28, 758740), (35, 606992), (40, 531118), (56, 379370), (59, 360080), (70, 303496), (80, 265559), (112, 189685), (118, 180040), (140, 151748), (236, 90020), (280, 75874), (295, 72016), (413, 51440), (472, 45010), (560, 37937), (590, 36008), (643, 33040), (826, 25720), (944, 22505), (1180, 18004), (1286, 16520), (1652, 12860), (2065, 10288), (2360, 9002), (2572, 8260), (3215, 6608), (3304, 6430), (4130, 5144), (4501, 4720)]