644966020

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{227}}^1\times {\mathrm{7477}}^1$

素因数の和:7732

約数の個数: 48

約数和(自身を含む): 1432186560

約数和(自身を除く): 787220540

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 227, 380, 454, 908, 1135, 2270, 4313, 4540, 7477, 8626, 14954, 17252, 21565, 29908, 37385, 43130, 74770, 86260, 142063, 149540, 284126, 568252, 710315, 1420630, 1697279, 2841260, 3394558, 6789116, 8486395, 16972790, 32248301, 33945580, 64496602, 128993204, 161241505, 322483010, 644966020]

約数ペア:

[(1, 644966020), (2, 322483010), (4, 161241505), (5, 128993204), (10, 64496602), (19, 33945580), (20, 32248301), (38, 16972790), (76, 8486395), (95, 6789116), (190, 3394558), (227, 2841260), (380, 1697279), (454, 1420630), (908, 710315), (1135, 568252), (2270, 284126), (4313, 149540), (4540, 142063), (7477, 86260), (8626, 74770), (14954, 43130), (17252, 37385), (21565, 29908)]