28869980

素因数分解:

$2^2\times 5^1\times {\mathrm{691}}^1\times {\mathrm{2089}}^1$

素因数の和:2789

約数の個数: 24

約数和(自身を含む): 60743760

約数和(自身を除く): 31873780

約数列:

[1, 2, 4, 5, 10, 20, 691, 1382, 2089, 2764, 3455, 4178, 6910, 8356, 10445, 13820, 20890, 41780, 1443499, 2886998, 5773996, 7217495, 14434990, 28869980]

約数ペア:

[(1, 28869980), (2, 14434990), (4, 7217495), (5, 5773996), (10, 2886998), (20, 1443499), (691, 41780), (1382, 20890), (2089, 13820), (2764, 10445), (3455, 8356), (4178, 6910)]