20982988

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{271}}^1\times {\mathrm{1489}}^1$

素因数の和:1777

約数の個数: 24

約数和(自身を含む): 39717440

約数和(自身を除く): 18734452

約数列:

[1, 2, 4, 13, 26, 52, 271, 542, 1084, 1489, 2978, 3523, 5956, 7046, 14092, 19357, 38714, 77428, 403519, 807038, 1614076, 5245747, 10491494, 20982988]

約数ペア:

[(1, 20982988), (2, 10491494), (4, 5245747), (13, 1614076), (26, 807038), (52, 403519), (271, 77428), (542, 38714), (1084, 19357), (1489, 14092), (2978, 7046), (3523, 5956)]