21000978828

素因数分解:

$2^2\times 3^2\times {\mathrm{23}}^1\times {\mathrm{947}}^1\times {\mathrm{26783}}^1$

素因数の和:27763

約数の個数: 72

約数和(自身を含む): 55454450688

約数和(自身を除く): 34453471860

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 69, 92, 138, 207, 276, 414, 828, 947, 1894, 2841, 3788, 5682, 8523, 11364, 17046, 21781, 26783, 34092, 43562, 53566, 65343, 80349, 87124, 107132, 130686, 160698, 196029, 241047, 261372, 321396, 392058, 482094, 616009, 784116, 964188, 1232018, 1848027, 2464036, 3696054, 5544081, 7392108, 11088162, 22176324, 25363501, 50727002, 76090503, 101454004, 152181006, 228271509, 304362012, 456543018, 583360523, 913086036, 1166721046, 1750081569, 2333442092, 3500163138, 5250244707, 7000326276, 10500489414, 21000978828]

約数ペア:

[(1, 21000978828), (2, 10500489414), (3, 7000326276), (4, 5250244707), (6, 3500163138), (9, 2333442092), (12, 1750081569), (18, 1166721046), (23, 913086036), (36, 583360523), (46, 456543018), (69, 304362012), (92, 228271509), (138, 152181006), (207, 101454004), (276, 76090503), (414, 50727002), (828, 25363501), (947, 22176324), (1894, 11088162), (2841, 7392108), (3788, 5544081), (5682, 3696054), (8523, 2464036), (11364, 1848027), (17046, 1232018), (21781, 964188), (26783, 784116), (34092, 616009), (43562, 482094), (53566, 392058), (65343, 321396), (80349, 261372), (87124, 241047), (107132, 196029), (130686, 160698)]