19972020

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{127}}^1\times {\mathrm{2621}}^1$

素因数の和:2760

約数の個数: 48

約数和(自身を含む): 56383488

約数和(自身を除く): 36411468

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 127, 254, 381, 508, 635, 762, 1270, 1524, 1905, 2540, 2621, 3810, 5242, 7620, 7863, 10484, 13105, 15726, 26210, 31452, 39315, 52420, 78630, 157260, 332867, 665734, 998601, 1331468, 1664335, 1997202, 3328670, 3994404, 4993005, 6657340, 9986010, 19972020]

約数ペア:

[(1, 19972020), (2, 9986010), (3, 6657340), (4, 4993005), (5, 3994404), (6, 3328670), (10, 1997202), (12, 1664335), (15, 1331468), (20, 998601), (30, 665734), (60, 332867), (127, 157260), (254, 78630), (381, 52420), (508, 39315), (635, 31452), (762, 26210), (1270, 15726), (1524, 13105), (1905, 10484), (2540, 7863), (2621, 7620), (3810, 5242)]