71721220

素因数分解:

$2^2\times 5^1\times {\mathrm{139}}^1\times {\mathrm{25799}}^1$

素因数の和:25947

約数の個数: 24

約数和(自身を含む): 151704000

約数和(自身を除く): 79982780

約数列:

[1, 2, 4, 5, 10, 20, 139, 278, 556, 695, 1390, 2780, 25799, 51598, 103196, 128995, 257990, 515980, 3586061, 7172122, 14344244, 17930305, 35860610, 71721220]

約数ペア:

[(1, 71721220), (2, 35860610), (4, 17930305), (5, 14344244), (10, 7172122), (20, 3586061), (139, 515980), (278, 257990), (556, 128995), (695, 103196), (1390, 51598), (2780, 25799)]