209849720

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{127}}^1\times {\mathrm{409}}^1$

素因数の和:648

約数の個数: 64

約数和(自身を含む): 481766400

約数和(自身を除く): 271916680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 127, 202, 254, 404, 409, 505, 508, 635, 808, 818, 1010, 1016, 1270, 1636, 2020, 2045, 2540, 3272, 4040, 4090, 5080, 8180, 12827, 16360, 25654, 41309, 51308, 51943, 64135, 82618, 102616, 103886, 128270, 165236, 206545, 207772, 256540, 259715, 330472, 413090, 415544, 513080, 519430, 826180, 1038860, 1652360, 2077720, 5246243, 10492486, 20984972, 26231215, 41969944, 52462430, 104924860, 209849720]

約数ペア:

[(1, 209849720), (2, 104924860), (4, 52462430), (5, 41969944), (8, 26231215), (10, 20984972), (20, 10492486), (40, 5246243), (101, 2077720), (127, 1652360), (202, 1038860), (254, 826180), (404, 519430), (409, 513080), (505, 415544), (508, 413090), (635, 330472), (808, 259715), (818, 256540), (1010, 207772), (1016, 206545), (1270, 165236), (1636, 128270), (2020, 103886), (2045, 102616), (2540, 82618), (3272, 64135), (4040, 51943), (4090, 51308), (5080, 41309), (8180, 25654), (12827, 16360)]