21560968

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{401}}^1$

素因数の和:478

約数の個数: 64

約数和(自身を含む): 48625920

約数和(自身を除く): 27064952

約数列:

[1, 2, 4, 8, 11, 13, 22, 26, 44, 47, 52, 88, 94, 104, 143, 188, 286, 376, 401, 517, 572, 611, 802, 1034, 1144, 1222, 1604, 2068, 2444, 3208, 4136, 4411, 4888, 5213, 6721, 8822, 10426, 13442, 17644, 18847, 20852, 26884, 35288, 37694, 41704, 53768, 57343, 75388, 114686, 150776, 207317, 229372, 245011, 414634, 458744, 490022, 829268, 980044, 1658536, 1960088, 2695121, 5390242, 10780484, 21560968]

約数ペア:

[(1, 21560968), (2, 10780484), (4, 5390242), (8, 2695121), (11, 1960088), (13, 1658536), (22, 980044), (26, 829268), (44, 490022), (47, 458744), (52, 414634), (88, 245011), (94, 229372), (104, 207317), (143, 150776), (188, 114686), (286, 75388), (376, 57343), (401, 53768), (517, 41704), (572, 37694), (611, 35288), (802, 26884), (1034, 20852), (1144, 18847), (1222, 17644), (1604, 13442), (2068, 10426), (2444, 8822), (3208, 6721), (4136, 5213), (4411, 4888)]