81315920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{145207}}^1$

素因数の和:145227

約数の個数: 40

約数和(自身を含む): 216069504

約数和(自身を除く): 134753584

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 145207, 290414, 580828, 726035, 1016449, 1161656, 1452070, 2032898, 2323312, 2904140, 4065796, 5082245, 5808280, 8131592, 10164490, 11616560, 16263184, 20328980, 40657960, 81315920]

約数ペア:

[(1, 81315920), (2, 40657960), (4, 20328980), (5, 16263184), (7, 11616560), (8, 10164490), (10, 8131592), (14, 5808280), (16, 5082245), (20, 4065796), (28, 2904140), (35, 2323312), (40, 2032898), (56, 1452070), (70, 1161656), (80, 1016449), (112, 726035), (140, 580828), (280, 290414), (560, 145207)]