19989280

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{7349}}^1$

素因数の和:7381

約数の個数: 48

約数和(自身を含む): 50009400

約数和(自身を除く): 30020120

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 68, 80, 85, 136, 160, 170, 272, 340, 544, 680, 1360, 2720, 7349, 14698, 29396, 36745, 58792, 73490, 117584, 124933, 146980, 235168, 249866, 293960, 499732, 587920, 624665, 999464, 1175840, 1249330, 1998928, 2498660, 3997856, 4997320, 9994640, 19989280]

約数ペア:

[(1, 19989280), (2, 9994640), (4, 4997320), (5, 3997856), (8, 2498660), (10, 1998928), (16, 1249330), (17, 1175840), (20, 999464), (32, 624665), (34, 587920), (40, 499732), (68, 293960), (80, 249866), (85, 235168), (136, 146980), (160, 124933), (170, 117584), (272, 73490), (340, 58792), (544, 36745), (680, 29396), (1360, 14698), (2720, 7349)]