171780

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{409}}^1$

素因数の和:428

約数の個数: 48

約数和(自身を含む): 551040

約数和(自身を除く): 379260

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 409, 420, 818, 1227, 1636, 2045, 2454, 2863, 4090, 4908, 5726, 6135, 8180, 8589, 11452, 12270, 14315, 17178, 24540, 28630, 34356, 42945, 57260, 85890, 171780]

約数ペア:

[(1, 171780), (2, 85890), (3, 57260), (4, 42945), (5, 34356), (6, 28630), (7, 24540), (10, 17178), (12, 14315), (14, 12270), (15, 11452), (20, 8589), (21, 8180), (28, 6135), (30, 5726), (35, 4908), (42, 4090), (60, 2863), (70, 2454), (84, 2045), (105, 1636), (140, 1227), (210, 818), (409, 420)]