320039990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{421}}^1\times {\mathrm{4001}}^1$

素因数の和:4448

約数の個数: 32

約数和(自身を含む): 607983840

約数和(自身を除く): 287943850

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 421, 842, 2105, 4001, 4210, 7999, 8002, 15998, 20005, 39995, 40010, 76019, 79990, 152038, 380095, 760190, 1684421, 3368842, 8422105, 16844210, 32003999, 64007998, 160019995, 320039990]

約数ペア:

[(1, 320039990), (2, 160019995), (5, 64007998), (10, 32003999), (19, 16844210), (38, 8422105), (95, 3368842), (190, 1684421), (421, 760190), (842, 380095), (2105, 152038), (4001, 79990), (4210, 76019), (7999, 40010), (8002, 39995), (15998, 20005)]