21061820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{1373}}^1$

素因数の和:1454

約数の個数: 48

約数和(自身を含む): 48474720

約数和(自身を除く): 27412900

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 59, 65, 118, 130, 236, 260, 295, 590, 767, 1180, 1373, 1534, 2746, 3068, 3835, 5492, 6865, 7670, 13730, 15340, 17849, 27460, 35698, 71396, 81007, 89245, 162014, 178490, 324028, 356980, 405035, 810070, 1053091, 1620140, 2106182, 4212364, 5265455, 10530910, 21061820]

約数ペア:

[(1, 21061820), (2, 10530910), (4, 5265455), (5, 4212364), (10, 2106182), (13, 1620140), (20, 1053091), (26, 810070), (52, 405035), (59, 356980), (65, 324028), (118, 178490), (130, 162014), (236, 89245), (260, 81007), (295, 71396), (590, 35698), (767, 27460), (1180, 17849), (1373, 15340), (1534, 13730), (2746, 7670), (3068, 6865), (3835, 5492)]