19938460

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{277}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 43434720

約数和(自身を除く): 23496260

約数列:

[1, 2, 4, 5, 10, 20, 59, 61, 118, 122, 236, 244, 277, 295, 305, 554, 590, 610, 1108, 1180, 1220, 1385, 2770, 3599, 5540, 7198, 14396, 16343, 16897, 17995, 32686, 33794, 35990, 65372, 67588, 71980, 81715, 84485, 163430, 168970, 326860, 337940, 996923, 1993846, 3987692, 4984615, 9969230, 19938460]

約数ペア:

[(1, 19938460), (2, 9969230), (4, 4984615), (5, 3987692), (10, 1993846), (20, 996923), (59, 337940), (61, 326860), (118, 168970), (122, 163430), (236, 84485), (244, 81715), (277, 71980), (295, 67588), (305, 65372), (554, 35990), (590, 33794), (610, 32686), (1108, 17995), (1180, 16897), (1220, 16343), (1385, 14396), (2770, 7198), (3599, 5540)]