20120984

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^2$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 42477120

約数和(自身を除く): 22356136

約数列:

[1, 2, 4, 8, 13, 26, 31, 52, 62, 79, 104, 124, 158, 248, 316, 403, 632, 806, 1027, 1612, 2054, 2449, 3224, 4108, 4898, 6241, 8216, 9796, 12482, 19592, 24964, 31837, 49928, 63674, 81133, 127348, 162266, 193471, 254696, 324532, 386942, 649064, 773884, 1547768, 2515123, 5030246, 10060492, 20120984]

約数ペア:

[(1, 20120984), (2, 10060492), (4, 5030246), (8, 2515123), (13, 1547768), (26, 773884), (31, 649064), (52, 386942), (62, 324532), (79, 254696), (104, 193471), (124, 162266), (158, 127348), (248, 81133), (316, 63674), (403, 49928), (632, 31837), (806, 24964), (1027, 19592), (1612, 12482), (2054, 9796), (2449, 8216), (3224, 6241), (4108, 4898)]