21209156619

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{70969}}^1$

素因数の和:71112

約数の個数: 48

約数和(自身を含む): 34951305600

約数和(自身を除く): 13742148981

約数列:

[1, 3, 7, 19, 21, 49, 57, 107, 133, 147, 321, 399, 749, 931, 2033, 2247, 2793, 5243, 6099, 14231, 15729, 42693, 70969, 99617, 212907, 298851, 496783, 1348411, 1490349, 3477481, 4045233, 7593683, 9438877, 10432443, 22781049, 28316631, 53155781, 66072139, 144279977, 159467343, 198216417, 372090467, 432839931, 1009959839, 1116271401, 3029879517, 7069718873, 21209156619]

約数ペア:

[(1, 21209156619), (3, 7069718873), (7, 3029879517), (19, 1116271401), (21, 1009959839), (49, 432839931), (57, 372090467), (107, 198216417), (133, 159467343), (147, 144279977), (321, 66072139), (399, 53155781), (749, 28316631), (931, 22781049), (2033, 10432443), (2247, 9438877), (2793, 7593683), (5243, 4045233), (6099, 3477481), (14231, 1490349), (15729, 1348411), (42693, 496783), (70969, 298851), (99617, 212907)]