21207628

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{313}}^1\times {\mathrm{1303}}^1$

素因数の和:1633

約数の個数: 24

約数和(自身を含む): 40126688

約数和(自身を除く): 18919060

約数列:

[1, 2, 4, 13, 26, 52, 313, 626, 1252, 1303, 2606, 4069, 5212, 8138, 16276, 16939, 33878, 67756, 407839, 815678, 1631356, 5301907, 10603814, 21207628]

約数ペア:

[(1, 21207628), (2, 10603814), (4, 5301907), (13, 1631356), (26, 815678), (52, 407839), (313, 67756), (626, 33878), (1252, 16939), (1303, 16276), (2606, 8138), (4069, 5212)]