19724380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{709}}^1$

素因数の和:838

約数の個数: 48

約数和(自身を含む): 45087840

約数和(自身を除く): 25363460

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 107, 130, 214, 260, 428, 535, 709, 1070, 1391, 1418, 2140, 2782, 2836, 3545, 5564, 6955, 7090, 9217, 13910, 14180, 18434, 27820, 36868, 46085, 75863, 92170, 151726, 184340, 303452, 379315, 758630, 986219, 1517260, 1972438, 3944876, 4931095, 9862190, 19724380]

約数ペア:

[(1, 19724380), (2, 9862190), (4, 4931095), (5, 3944876), (10, 1972438), (13, 1517260), (20, 986219), (26, 758630), (52, 379315), (65, 303452), (107, 184340), (130, 151726), (214, 92170), (260, 75863), (428, 46085), (535, 36868), (709, 27820), (1070, 18434), (1391, 14180), (1418, 13910), (2140, 9217), (2782, 7090), (2836, 6955), (3545, 5564)]