20701928

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{2971}}^1$

素因数の和:3057

約数の個数: 32

約数和(自身を含む): 42440160

約数和(自身を除く): 21738232

約数列:

[1, 2, 4, 8, 13, 26, 52, 67, 104, 134, 268, 536, 871, 1742, 2971, 3484, 5942, 6968, 11884, 23768, 38623, 77246, 154492, 199057, 308984, 398114, 796228, 1592456, 2587741, 5175482, 10350964, 20701928]

約数ペア:

[(1, 20701928), (2, 10350964), (4, 5175482), (8, 2587741), (13, 1592456), (26, 796228), (52, 398114), (67, 308984), (104, 199057), (134, 154492), (268, 77246), (536, 38623), (871, 23768), (1742, 11884), (2971, 6968), (3484, 5942)]