21260120

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{10847}}^1$

素因数の和:10872

約数の個数: 48

約数和(自身を含む): 55650240

約数和(自身を除く): 34390120

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 98, 140, 196, 245, 280, 392, 490, 980, 1960, 10847, 21694, 43388, 54235, 75929, 86776, 108470, 151858, 216940, 303716, 379645, 433880, 531503, 607432, 759290, 1063006, 1518580, 2126012, 2657515, 3037160, 4252024, 5315030, 10630060, 21260120]

約数ペア:

[(1, 21260120), (2, 10630060), (4, 5315030), (5, 4252024), (7, 3037160), (8, 2657515), (10, 2126012), (14, 1518580), (20, 1063006), (28, 759290), (35, 607432), (40, 531503), (49, 433880), (56, 379645), (70, 303716), (98, 216940), (140, 151858), (196, 108470), (245, 86776), (280, 75929), (392, 54235), (490, 43388), (980, 21694), (1960, 10847)]