21000916512

素因数分解:

$2^5\times 3^2\times {\mathrm{509}}^1\times {\mathrm{143261}}^1$

素因数の和:143786

約数の個数: 72

約数和(自身を含む): 59839104780

約数和(自身を除く): 38838188268

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 32, 36, 48, 72, 96, 144, 288, 509, 1018, 1527, 2036, 3054, 4072, 4581, 6108, 8144, 9162, 12216, 16288, 18324, 24432, 36648, 48864, 73296, 143261, 146592, 286522, 429783, 573044, 859566, 1146088, 1289349, 1719132, 2292176, 2578698, 3438264, 4584352, 5157396, 6876528, 10314792, 13753056, 20629584, 41259168, 72919849, 145839698, 218759547, 291679396, 437519094, 583358792, 656278641, 875038188, 1166717584, 1312557282, 1750076376, 2333435168, 2625114564, 3500152752, 5250229128, 7000305504, 10500458256, 21000916512]

約数ペア:

[(1, 21000916512), (2, 10500458256), (3, 7000305504), (4, 5250229128), (6, 3500152752), (8, 2625114564), (9, 2333435168), (12, 1750076376), (16, 1312557282), (18, 1166717584), (24, 875038188), (32, 656278641), (36, 583358792), (48, 437519094), (72, 291679396), (96, 218759547), (144, 145839698), (288, 72919849), (509, 41259168), (1018, 20629584), (1527, 13753056), (2036, 10314792), (3054, 6876528), (4072, 5157396), (4581, 4584352), (6108, 3438264), (8144, 2578698), (9162, 2292176), (12216, 1719132), (16288, 1289349), (18324, 1146088), (24432, 859566), (36648, 573044), (48864, 429783), (73296, 286522), (143261, 146592)]