21505816

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{5101}}^1$

素因数の和:5155

約数の個数: 32

約数和(自身を含む): 44081280

約数和(自身を除く): 22575464

約数列:

[1, 2, 4, 8, 17, 31, 34, 62, 68, 124, 136, 248, 527, 1054, 2108, 4216, 5101, 10202, 20404, 40808, 86717, 158131, 173434, 316262, 346868, 632524, 693736, 1265048, 2688227, 5376454, 10752908, 21505816]

約数ペア:

[(1, 21505816), (2, 10752908), (4, 5376454), (8, 2688227), (17, 1265048), (31, 693736), (34, 632524), (62, 346868), (68, 316262), (124, 173434), (136, 158131), (248, 86717), (527, 40808), (1054, 20404), (2108, 10202), (4216, 5101)]