21458720

素因数分解:

$2^5\times 5^1\times {\mathrm{43}}^1\times {\mathrm{3119}}^1$

素因数の和:3177

約数の個数: 48

約数和(自身を含む): 51891840

約数和(自身を除く): 30433120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 80, 86, 160, 172, 215, 344, 430, 688, 860, 1376, 1720, 3119, 3440, 6238, 6880, 12476, 15595, 24952, 31190, 49904, 62380, 99808, 124760, 134117, 249520, 268234, 499040, 536468, 670585, 1072936, 1341170, 2145872, 2682340, 4291744, 5364680, 10729360, 21458720]

約数ペア:

[(1, 21458720), (2, 10729360), (4, 5364680), (5, 4291744), (8, 2682340), (10, 2145872), (16, 1341170), (20, 1072936), (32, 670585), (40, 536468), (43, 499040), (80, 268234), (86, 249520), (160, 134117), (172, 124760), (215, 99808), (344, 62380), (430, 49904), (688, 31190), (860, 24952), (1376, 15595), (1720, 12476), (3119, 6880), (3440, 6238)]