257194520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{659}}^1\times {\mathrm{887}}^1$

素因数の和:1568

約数の個数: 64

約数和(自身を含む): 632966400

約数和(自身を除く): 375771880

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 659, 887, 1318, 1774, 2636, 3295, 3548, 4435, 5272, 6590, 7096, 7249, 8870, 9757, 13180, 14498, 17740, 19514, 26360, 28996, 35480, 36245, 39028, 48785, 57992, 72490, 78056, 97570, 144980, 195140, 289960, 390280, 584533, 1169066, 2338132, 2922665, 4676264, 5845330, 6429863, 11690660, 12859726, 23381320, 25719452, 32149315, 51438904, 64298630, 128597260, 257194520]

約数ペア:

[(1, 257194520), (2, 128597260), (4, 64298630), (5, 51438904), (8, 32149315), (10, 25719452), (11, 23381320), (20, 12859726), (22, 11690660), (40, 6429863), (44, 5845330), (55, 4676264), (88, 2922665), (110, 2338132), (220, 1169066), (440, 584533), (659, 390280), (887, 289960), (1318, 195140), (1774, 144980), (2636, 97570), (3295, 78056), (3548, 72490), (4435, 57992), (5272, 48785), (6590, 39028), (7096, 36245), (7249, 35480), (8870, 28996), (9757, 26360), (13180, 19514), (14498, 17740)]