80018920

素因数分解:

$2^3\times 5^1\times {\mathrm{739}}^1\times {\mathrm{2707}}^1$

素因数の和:3457

約数の個数: 32

約数和(自身を含む): 180352800

約数和(自身を除く): 100333880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 739, 1478, 2707, 2956, 3695, 5414, 5912, 7390, 10828, 13535, 14780, 21656, 27070, 29560, 54140, 108280, 2000473, 4000946, 8001892, 10002365, 16003784, 20004730, 40009460, 80018920]

約数ペア:

[(1, 80018920), (2, 40009460), (4, 20004730), (5, 16003784), (8, 10002365), (10, 8001892), (20, 4000946), (40, 2000473), (739, 108280), (1478, 54140), (2707, 29560), (2956, 27070), (3695, 21656), (5414, 14780), (5912, 13535), (7390, 10828)]