17920895

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 23950080

約数和(自身を除く): 6029185

約数列:

[1, 5, 19, 41, 43, 95, 107, 205, 215, 535, 779, 817, 1763, 2033, 3895, 4085, 4387, 4601, 8815, 10165, 21935, 23005, 33497, 83353, 87419, 167485, 188641, 416765, 437095, 943205, 3584179, 17920895]

約数ペア:

[(1, 17920895), (5, 3584179), (19, 943205), (41, 437095), (43, 416765), (95, 188641), (107, 167485), (205, 87419), (215, 83353), (535, 33497), (779, 23005), (817, 21935), (1763, 10165), (2033, 8815), (3895, 4601), (4085, 4387)]