21429160

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{2539}}^1$

素因数の和:2761

約数の個数: 32

約数和(自身を含む): 48463200

約数和(自身を除く): 27034040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 2539, 4220, 5078, 8440, 10156, 12695, 20312, 25390, 50780, 101560, 535729, 1071458, 2142916, 2678645, 4285832, 5357290, 10714580, 21429160]

約数ペア:

[(1, 21429160), (2, 10714580), (4, 5357290), (5, 4285832), (8, 2678645), (10, 2142916), (20, 1071458), (40, 535729), (211, 101560), (422, 50780), (844, 25390), (1055, 20312), (1688, 12695), (2110, 10156), (2539, 8440), (4220, 5078)]