21390936

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{811}}^1$

素因数の和:984

約数の個数: 64

約数和(自身を含む): 61582080

約数和(自身を除く): 40191144

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 21, 24, 28, 42, 56, 84, 157, 168, 314, 471, 628, 811, 942, 1099, 1256, 1622, 1884, 2198, 2433, 3244, 3297, 3768, 4396, 4866, 5677, 6488, 6594, 8792, 9732, 11354, 13188, 17031, 19464, 22708, 26376, 34062, 45416, 68124, 127327, 136248, 254654, 381981, 509308, 763962, 891289, 1018616, 1527924, 1782578, 2673867, 3055848, 3565156, 5347734, 7130312, 10695468, 21390936]

約数ペア:

[(1, 21390936), (2, 10695468), (3, 7130312), (4, 5347734), (6, 3565156), (7, 3055848), (8, 2673867), (12, 1782578), (14, 1527924), (21, 1018616), (24, 891289), (28, 763962), (42, 509308), (56, 381981), (84, 254654), (157, 136248), (168, 127327), (314, 68124), (471, 45416), (628, 34062), (811, 26376), (942, 22708), (1099, 19464), (1256, 17031), (1622, 13188), (1884, 11354), (2198, 9732), (2433, 8792), (3244, 6594), (3297, 6488), (3768, 5677), (4396, 4866)]