20742340

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{271}}^1$

素因数の和:412

約数の個数: 48

約数和(自身を含む): 45239040

約数和(自身を除く): 24496700

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 89, 172, 178, 215, 271, 356, 430, 445, 542, 860, 890, 1084, 1355, 1780, 2710, 3827, 5420, 7654, 11653, 15308, 19135, 23306, 24119, 38270, 46612, 48238, 58265, 76540, 96476, 116530, 120595, 233060, 241190, 482380, 1037117, 2074234, 4148468, 5185585, 10371170, 20742340]

約数ペア:

[(1, 20742340), (2, 10371170), (4, 5185585), (5, 4148468), (10, 2074234), (20, 1037117), (43, 482380), (86, 241190), (89, 233060), (172, 120595), (178, 116530), (215, 96476), (271, 76540), (356, 58265), (430, 48238), (445, 46612), (542, 38270), (860, 24119), (890, 23306), (1084, 19135), (1355, 15308), (1780, 11653), (2710, 7654), (3827, 5420)]