20645144

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{1109}}^1$

素因数の和:1307

約数の個数: 32

約数和(自身を含む): 41958000

約数和(自身を除く): 21312856

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 179, 358, 716, 1109, 1432, 2218, 2327, 4436, 4654, 8872, 9308, 14417, 18616, 28834, 57668, 115336, 198511, 397022, 794044, 1588088, 2580643, 5161286, 10322572, 20645144]

約数ペア:

[(1, 20645144), (2, 10322572), (4, 5161286), (8, 2580643), (13, 1588088), (26, 794044), (52, 397022), (104, 198511), (179, 115336), (358, 57668), (716, 28834), (1109, 18616), (1432, 14417), (2218, 9308), (2327, 8872), (4436, 4654)]