28408420

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{74759}}^1$

素因数の和:74787

約数の個数: 24

約数和(自身を含む): 62798400

約数和(自身を除く): 34389980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 74759, 149518, 299036, 373795, 747590, 1420421, 1495180, 2840842, 5681684, 7102105, 14204210, 28408420]

約数ペア:

[(1, 28408420), (2, 14204210), (4, 7102105), (5, 5681684), (10, 2840842), (19, 1495180), (20, 1420421), (38, 747590), (76, 373795), (95, 299036), (190, 149518), (380, 74759)]