19717220

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{101}}^1\times {\mathrm{227}}^1$

素因数の和:380

約数の個数: 48

約数和(自身を含む): 42977088

約数和(自身を除く): 23259868

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 101, 172, 202, 215, 227, 404, 430, 454, 505, 860, 908, 1010, 1135, 2020, 2270, 4343, 4540, 8686, 9761, 17372, 19522, 21715, 22927, 39044, 43430, 45854, 48805, 86860, 91708, 97610, 114635, 195220, 229270, 458540, 985861, 1971722, 3943444, 4929305, 9858610, 19717220]

約数ペア:

[(1, 19717220), (2, 9858610), (4, 4929305), (5, 3943444), (10, 1971722), (20, 985861), (43, 458540), (86, 229270), (101, 195220), (172, 114635), (202, 97610), (215, 91708), (227, 86860), (404, 48805), (430, 45854), (454, 43430), (505, 39044), (860, 22927), (908, 21715), (1010, 19522), (1135, 17372), (2020, 9761), (2270, 8686), (4343, 4540)]