21567220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{229}}^1\times {\mathrm{277}}^1$

素因数の和:532

約数の個数: 48

約数和(自身を含む): 48338640

約数和(自身を除く): 26771420

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 229, 277, 340, 458, 554, 916, 1108, 1145, 1385, 2290, 2770, 3893, 4580, 4709, 5540, 7786, 9418, 15572, 18836, 19465, 23545, 38930, 47090, 63433, 77860, 94180, 126866, 253732, 317165, 634330, 1078361, 1268660, 2156722, 4313444, 5391805, 10783610, 21567220]

約数ペア:

[(1, 21567220), (2, 10783610), (4, 5391805), (5, 4313444), (10, 2156722), (17, 1268660), (20, 1078361), (34, 634330), (68, 317165), (85, 253732), (170, 126866), (229, 94180), (277, 77860), (340, 63433), (458, 47090), (554, 38930), (916, 23545), (1108, 19465), (1145, 18836), (1385, 15572), (2290, 9418), (2770, 7786), (3893, 5540), (4580, 4709)]