205121540

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1\times {\mathrm{3739}}^1$

素因数の和:3972

約数の個数: 48

約数和(自身を含む): 466213440

約数和(自身を除く): 261091900

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 211, 260, 422, 844, 1055, 2110, 2743, 3739, 4220, 5486, 7478, 10972, 13715, 14956, 18695, 27430, 37390, 48607, 54860, 74780, 97214, 194428, 243035, 486070, 788929, 972140, 1577858, 3155716, 3944645, 7889290, 10256077, 15778580, 20512154, 41024308, 51280385, 102560770, 205121540]

約数ペア:

[(1, 205121540), (2, 102560770), (4, 51280385), (5, 41024308), (10, 20512154), (13, 15778580), (20, 10256077), (26, 7889290), (52, 3944645), (65, 3155716), (130, 1577858), (211, 972140), (260, 788929), (422, 486070), (844, 243035), (1055, 194428), (2110, 97214), (2743, 74780), (3739, 54860), (4220, 48607), (5486, 37390), (7478, 27430), (10972, 18695), (13715, 14956)]