20581808

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1867}}^1$

素因数の和:1941

約数の個数: 40

約数和(自身を含む): 43778448

約数和(自身を除く): 23196640

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 53, 104, 106, 208, 212, 424, 689, 848, 1378, 1867, 2756, 3734, 5512, 7468, 11024, 14936, 24271, 29872, 48542, 97084, 98951, 194168, 197902, 388336, 395804, 791608, 1286363, 1583216, 2572726, 5145452, 10290904, 20581808]

約数ペア:

[(1, 20581808), (2, 10290904), (4, 5145452), (8, 2572726), (13, 1583216), (16, 1286363), (26, 791608), (52, 395804), (53, 388336), (104, 197902), (106, 194168), (208, 98951), (212, 97084), (424, 48542), (689, 29872), (848, 24271), (1378, 14936), (1867, 11024), (2756, 7468), (3734, 5512)]