31304860

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{409}}^1$

素因数の和:550

約数の個数: 48

約数和(自身を含む): 68191200

約数和(自身を除く): 36886340

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 89, 172, 178, 215, 356, 409, 430, 445, 818, 860, 890, 1636, 1780, 2045, 3827, 4090, 7654, 8180, 15308, 17587, 19135, 35174, 36401, 38270, 70348, 72802, 76540, 87935, 145604, 175870, 182005, 351740, 364010, 728020, 1565243, 3130486, 6260972, 7826215, 15652430, 31304860]

約数ペア:

[(1, 31304860), (2, 15652430), (4, 7826215), (5, 6260972), (10, 3130486), (20, 1565243), (43, 728020), (86, 364010), (89, 351740), (172, 182005), (178, 175870), (215, 145604), (356, 87935), (409, 76540), (430, 72802), (445, 70348), (818, 38270), (860, 36401), (890, 35174), (1636, 19135), (1780, 17587), (2045, 15308), (3827, 8180), (4090, 7654)]