19746220

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{439}}^1$

素因数の和:634

約数の個数: 48

約数和(自身を含む): 45017280

約数和(自身を除く): 25271060

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 173, 260, 346, 439, 692, 865, 878, 1730, 1756, 2195, 2249, 3460, 4390, 4498, 5707, 8780, 8996, 11245, 11414, 22490, 22828, 28535, 44980, 57070, 75947, 114140, 151894, 303788, 379735, 759470, 987311, 1518940, 1974622, 3949244, 4936555, 9873110, 19746220]

約数ペア:

[(1, 19746220), (2, 9873110), (4, 4936555), (5, 3949244), (10, 1974622), (13, 1518940), (20, 987311), (26, 759470), (52, 379735), (65, 303788), (130, 151894), (173, 114140), (260, 75947), (346, 57070), (439, 44980), (692, 28535), (865, 22828), (878, 22490), (1730, 11414), (1756, 11245), (2195, 8996), (2249, 8780), (3460, 5707), (4390, 4498)]