21450416

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{281}}^1\times {\mathrm{367}}^1$

素因数の和:669

約数の個数: 40

約数和(自身を含む): 45038784

約数和(自身を除く): 23588368

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 281, 367, 562, 734, 1124, 1468, 2248, 2936, 3653, 4496, 4771, 5872, 7306, 9542, 14612, 19084, 29224, 38168, 58448, 76336, 103127, 206254, 412508, 825016, 1340651, 1650032, 2681302, 5362604, 10725208, 21450416]

約数ペア:

[(1, 21450416), (2, 10725208), (4, 5362604), (8, 2681302), (13, 1650032), (16, 1340651), (26, 825016), (52, 412508), (104, 206254), (208, 103127), (281, 76336), (367, 58448), (562, 38168), (734, 29224), (1124, 19084), (1468, 14612), (2248, 9542), (2936, 7306), (3653, 5872), (4496, 4771)]