20191964

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{4363}}^1$

素因数の和:4469

約数の個数: 24

約数和(自身を含む): 38490480

約数和(自身を除く): 18298516

約数列:

[1, 2, 4, 13, 26, 52, 89, 178, 356, 1157, 2314, 4363, 4628, 8726, 17452, 56719, 113438, 226876, 388307, 776614, 1553228, 5047991, 10095982, 20191964]

約数ペア:

[(1, 20191964), (2, 10095982), (4, 5047991), (13, 1553228), (26, 776614), (52, 388307), (89, 226876), (178, 113438), (356, 56719), (1157, 17452), (2314, 8726), (4363, 4628)]