21065390

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{191}}^1\times {\mathrm{269}}^1$

素因数の和:508

約数の個数: 32

約数和(自身を含む): 39191040

約数和(自身を除く): 18125650

約数列:

[1, 2, 5, 10, 41, 82, 191, 205, 269, 382, 410, 538, 955, 1345, 1910, 2690, 7831, 11029, 15662, 22058, 39155, 51379, 55145, 78310, 102758, 110290, 256895, 513790, 2106539, 4213078, 10532695, 21065390]

約数ペア:

[(1, 21065390), (2, 10532695), (5, 4213078), (10, 2106539), (41, 513790), (82, 256895), (191, 110290), (205, 102758), (269, 78310), (382, 55145), (410, 51379), (538, 39155), (955, 22058), (1345, 15662), (1910, 11029), (2690, 7831)]