645580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{191}}^1$

素因数の和:226

約数の個数: 36

約数和(自身を含む): 1475712

約数和(自身を除く): 830132

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 191, 260, 338, 382, 676, 764, 845, 955, 1690, 1910, 2483, 3380, 3820, 4966, 9932, 12415, 24830, 32279, 49660, 64558, 129116, 161395, 322790, 645580]

約数ペア:

[(1, 645580), (2, 322790), (4, 161395), (5, 129116), (10, 64558), (13, 49660), (20, 32279), (26, 24830), (52, 12415), (65, 9932), (130, 4966), (169, 3820), (191, 3380), (260, 2483), (338, 1910), (382, 1690), (676, 955), (764, 845)]