20491016

素因数分解:

$2^3\times 7^2\times {\mathrm{13}}^1\times {\mathrm{4021}}^1$

素因数の和:4054

約数の個数: 48

約数和(自身を含む): 48143340

約数和(自身を除く): 27652324

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 49, 52, 56, 91, 98, 104, 182, 196, 364, 392, 637, 728, 1274, 2548, 4021, 5096, 8042, 16084, 28147, 32168, 52273, 56294, 104546, 112588, 197029, 209092, 225176, 365911, 394058, 418184, 731822, 788116, 1463644, 1576232, 2561377, 2927288, 5122754, 10245508, 20491016]

約数ペア:

[(1, 20491016), (2, 10245508), (4, 5122754), (7, 2927288), (8, 2561377), (13, 1576232), (14, 1463644), (26, 788116), (28, 731822), (49, 418184), (52, 394058), (56, 365911), (91, 225176), (98, 209092), (104, 197029), (182, 112588), (196, 104546), (364, 56294), (392, 52273), (637, 32168), (728, 28147), (1274, 16084), (2548, 8042), (4021, 5096)]