217871493

素因数分解:

$3^1\times 7^2\times {\mathrm{73}}^1\times {\mathrm{79}}^1\times {\mathrm{257}}^1$

素因数の和:426

約数の個数: 48

約数和(自身を含む): 348238080

約数和(自身を除く): 130366587

約数列:

[1, 3, 7, 21, 49, 73, 79, 147, 219, 237, 257, 511, 553, 771, 1533, 1659, 1799, 3577, 3871, 5397, 5767, 10731, 11613, 12593, 17301, 18761, 20303, 37779, 40369, 56283, 60909, 121107, 131327, 142121, 282583, 393981, 426363, 847749, 919289, 994847, 1482119, 2757867, 2984541, 4446357, 10374833, 31124499, 72623831, 217871493]

約数ペア:

[(1, 217871493), (3, 72623831), (7, 31124499), (21, 10374833), (49, 4446357), (73, 2984541), (79, 2757867), (147, 1482119), (219, 994847), (237, 919289), (257, 847749), (511, 426363), (553, 393981), (771, 282583), (1533, 142121), (1659, 131327), (1799, 121107), (3577, 60909), (3871, 56283), (5397, 40369), (5767, 37779), (10731, 20303), (11613, 18761), (12593, 17301)]