20115968

素因数分解:

$2^9\times {\mathrm{101}}^1\times {\mathrm{389}}^1$

素因数の和:508

約数の個数: 40

約数和(自身を含む): 40694940

約数和(自身を除く): 20578972

約数列:

[1, 2, 4, 8, 16, 32, 64, 101, 128, 202, 256, 389, 404, 512, 778, 808, 1556, 1616, 3112, 3232, 6224, 6464, 12448, 12928, 24896, 25856, 39289, 49792, 51712, 78578, 99584, 157156, 199168, 314312, 628624, 1257248, 2514496, 5028992, 10057984, 20115968]

約数ペア:

[(1, 20115968), (2, 10057984), (4, 5028992), (8, 2514496), (16, 1257248), (32, 628624), (64, 314312), (101, 199168), (128, 157156), (202, 99584), (256, 78578), (389, 51712), (404, 49792), (512, 39289), (778, 25856), (808, 24896), (1556, 12928), (1616, 12448), (3112, 6464), (3232, 6224)]