19894540

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{709}}^1$

素因数の和:802

約数の個数: 48

約数和(自身を含む): 44372160

約数和(自身を除く): 24477620

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 61, 92, 115, 122, 230, 244, 305, 460, 610, 709, 1220, 1403, 1418, 2806, 2836, 3545, 5612, 7015, 7090, 14030, 14180, 16307, 28060, 32614, 43249, 65228, 81535, 86498, 163070, 172996, 216245, 326140, 432490, 864980, 994727, 1989454, 3978908, 4973635, 9947270, 19894540]

約数ペア:

[(1, 19894540), (2, 9947270), (4, 4973635), (5, 3978908), (10, 1989454), (20, 994727), (23, 864980), (46, 432490), (61, 326140), (92, 216245), (115, 172996), (122, 163070), (230, 86498), (244, 81535), (305, 65228), (460, 43249), (610, 32614), (709, 28060), (1220, 16307), (1403, 14180), (1418, 14030), (2806, 7090), (2836, 7015), (3545, 5612)]