21078380

素因数分解:

$2^2\times 5^1\times {\mathrm{271}}^1\times {\mathrm{3889}}^1$

素因数の和:4169

約数の個数: 24

約数和(自身を含む): 44439360

約数和(自身を除く): 23360980

約数列:

[1, 2, 4, 5, 10, 20, 271, 542, 1084, 1355, 2710, 3889, 5420, 7778, 15556, 19445, 38890, 77780, 1053919, 2107838, 4215676, 5269595, 10539190, 21078380]

約数ペア:

[(1, 21078380), (2, 10539190), (4, 5269595), (5, 4215676), (10, 2107838), (20, 1053919), (271, 77780), (542, 38890), (1084, 19445), (1355, 15556), (2710, 7778), (3889, 5420)]