209156920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{746989}}^1$

素因数の和:747007

約数の個数: 32

約数和(自身を含む): 537832800

約数和(自身を除く): 328675880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 746989, 1493978, 2987956, 3734945, 5228923, 5975912, 7469890, 10457846, 14939780, 20915692, 26144615, 29879560, 41831384, 52289230, 104578460, 209156920]

約数ペア:

[(1, 209156920), (2, 104578460), (4, 52289230), (5, 41831384), (7, 29879560), (8, 26144615), (10, 20915692), (14, 14939780), (20, 10457846), (28, 7469890), (35, 5975912), (40, 5228923), (56, 3734945), (70, 2987956), (140, 1493978), (280, 746989)]