21072116

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{1303}}^1$

素因数の和:1631

約数の個数: 24

約数和(自身を含む): 39871104

約数和(自身を除く): 18798988

約数列:

[1, 2, 4, 13, 26, 52, 311, 622, 1244, 1303, 2606, 4043, 5212, 8086, 16172, 16939, 33878, 67756, 405233, 810466, 1620932, 5268029, 10536058, 21072116]

約数ペア:

[(1, 21072116), (2, 10536058), (4, 5268029), (13, 1620932), (26, 810466), (52, 405233), (311, 67756), (622, 33878), (1244, 16939), (1303, 16172), (2606, 8086), (4043, 5212)]