21068080

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{269}}^1$

素因数の和:382

約数の個数: 80

約数和(自身を含む): 54237600

約数和(自身を除く): 33169520

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 89, 110, 176, 178, 220, 269, 356, 440, 445, 538, 712, 880, 890, 979, 1076, 1345, 1424, 1780, 1958, 2152, 2690, 2959, 3560, 3916, 4304, 4895, 5380, 5918, 7120, 7832, 9790, 10760, 11836, 14795, 15664, 19580, 21520, 23672, 23941, 29590, 39160, 47344, 47882, 59180, 78320, 95764, 118360, 119705, 191528, 236720, 239410, 263351, 383056, 478820, 526702, 957640, 1053404, 1316755, 1915280, 2106808, 2633510, 4213616, 5267020, 10534040, 21068080]

約数ペア:

[(1, 21068080), (2, 10534040), (4, 5267020), (5, 4213616), (8, 2633510), (10, 2106808), (11, 1915280), (16, 1316755), (20, 1053404), (22, 957640), (40, 526702), (44, 478820), (55, 383056), (80, 263351), (88, 239410), (89, 236720), (110, 191528), (176, 119705), (178, 118360), (220, 95764), (269, 78320), (356, 59180), (440, 47882), (445, 47344), (538, 39160), (712, 29590), (880, 23941), (890, 23672), (979, 21520), (1076, 19580), (1345, 15664), (1424, 14795), (1780, 11836), (1958, 10760), (2152, 9790), (2690, 7832), (2959, 7120), (3560, 5918), (3916, 5380), (4304, 4895)]