20120406640

素因数分解:

$2^4\times 5^1\times {\mathrm{257}}^1\times {\mathrm{978619}}^1$

素因数の和:978889

約数の個数: 40

約数和(自身を含む): 46962016560

約数和(自身を除く): 26841609920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257, 514, 1028, 1285, 2056, 2570, 4112, 5140, 10280, 20560, 978619, 1957238, 3914476, 4893095, 7828952, 9786190, 15657904, 19572380, 39144760, 78289520, 251505083, 503010166, 1006020332, 1257525415, 2012040664, 2515050830, 4024081328, 5030101660, 10060203320, 20120406640]

約数ペア:

[(1, 20120406640), (2, 10060203320), (4, 5030101660), (5, 4024081328), (8, 2515050830), (10, 2012040664), (16, 1257525415), (20, 1006020332), (40, 503010166), (80, 251505083), (257, 78289520), (514, 39144760), (1028, 19572380), (1285, 15657904), (2056, 9786190), (2570, 7828952), (4112, 4893095), (5140, 3914476), (10280, 1957238), (20560, 978619)]