20449840

素因数分解:

$2^4\times 5^1\times {\mathrm{107}}^1\times {\mathrm{2389}}^1$

素因数の和:2509

約数の個数: 40

約数和(自身を含む): 48010320

約数和(自身を除く): 27560480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 107, 214, 428, 535, 856, 1070, 1712, 2140, 2389, 4280, 4778, 8560, 9556, 11945, 19112, 23890, 38224, 47780, 95560, 191120, 255623, 511246, 1022492, 1278115, 2044984, 2556230, 4089968, 5112460, 10224920, 20449840]

約数ペア:

[(1, 20449840), (2, 10224920), (4, 5112460), (5, 4089968), (8, 2556230), (10, 2044984), (16, 1278115), (20, 1022492), (40, 511246), (80, 255623), (107, 191120), (214, 95560), (428, 47780), (535, 38224), (856, 23890), (1070, 19112), (1712, 11945), (2140, 9556), (2389, 8560), (4280, 4778)]