31578020

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{139}}^1\times {\mathrm{307}}^1$

素因数の和:492

約数の個数: 48

約数和(自身を含む): 68819520

約数和(自身を除く): 37241500

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 139, 148, 185, 278, 307, 370, 556, 614, 695, 740, 1228, 1390, 1535, 2780, 3070, 5143, 6140, 10286, 11359, 20572, 22718, 25715, 42673, 45436, 51430, 56795, 85346, 102860, 113590, 170692, 213365, 227180, 426730, 853460, 1578901, 3157802, 6315604, 7894505, 15789010, 31578020]

約数ペア:

[(1, 31578020), (2, 15789010), (4, 7894505), (5, 6315604), (10, 3157802), (20, 1578901), (37, 853460), (74, 426730), (139, 227180), (148, 213365), (185, 170692), (278, 113590), (307, 102860), (370, 85346), (556, 56795), (614, 51430), (695, 45436), (740, 42673), (1228, 25715), (1390, 22718), (1535, 20572), (2780, 11359), (3070, 10286), (5143, 6140)]