20964640

素因数分解:

$2^5\times 5^1\times {\mathrm{283}}^1\times {\mathrm{463}}^1$

素因数の和:761

約数の個数: 48

約数和(自身を含む): 49811328

約数和(自身を除く): 28846688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 283, 463, 566, 926, 1132, 1415, 1852, 2264, 2315, 2830, 3704, 4528, 4630, 5660, 7408, 9056, 9260, 11320, 14816, 18520, 22640, 37040, 45280, 74080, 131029, 262058, 524116, 655145, 1048232, 1310290, 2096464, 2620580, 4192928, 5241160, 10482320, 20964640]

約数ペア:

[(1, 20964640), (2, 10482320), (4, 5241160), (5, 4192928), (8, 2620580), (10, 2096464), (16, 1310290), (20, 1048232), (32, 655145), (40, 524116), (80, 262058), (160, 131029), (283, 74080), (463, 45280), (566, 37040), (926, 22640), (1132, 18520), (1415, 14816), (1852, 11320), (2264, 9260), (2315, 9056), (2830, 7408), (3704, 5660), (4528, 4630)]