639847540

素因数分解:

$2^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{293}}^1\times {\mathrm{797}}^1$

素因数の和:1236

約数の個数: 48

約数和(自身を含む): 1359811152

約数和(自身を除く): 719963612

約数列:

[1, 2, 4, 5, 10, 20, 137, 274, 293, 548, 586, 685, 797, 1172, 1370, 1465, 1594, 2740, 2930, 3188, 3985, 5860, 7970, 15940, 40141, 80282, 109189, 160564, 200705, 218378, 233521, 401410, 436756, 467042, 545945, 802820, 934084, 1091890, 1167605, 2183780, 2335210, 4670420, 31992377, 63984754, 127969508, 159961885, 319923770, 639847540]

約数ペア:

[(1, 639847540), (2, 319923770), (4, 159961885), (5, 127969508), (10, 63984754), (20, 31992377), (137, 4670420), (274, 2335210), (293, 2183780), (548, 1167605), (586, 1091890), (685, 934084), (797, 802820), (1172, 545945), (1370, 467042), (1465, 436756), (1594, 401410), (2740, 233521), (2930, 218378), (3188, 200705), (3985, 160564), (5860, 109189), (7970, 80282), (15940, 40141)]