21495820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{3719}}^1$

素因数の和:3762

約数の個数: 36

約数和(自身を含む): 47965680

約数和(自身を除く): 26469860

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 289, 340, 578, 1156, 1445, 2890, 3719, 5780, 7438, 14876, 18595, 37190, 63223, 74380, 126446, 252892, 316115, 632230, 1074791, 1264460, 2149582, 4299164, 5373955, 10747910, 21495820]

約数ペア:

[(1, 21495820), (2, 10747910), (4, 5373955), (5, 4299164), (10, 2149582), (17, 1264460), (20, 1074791), (34, 632230), (68, 316115), (85, 252892), (170, 126446), (289, 74380), (340, 63223), (578, 37190), (1156, 18595), (1445, 14876), (2890, 7438), (3719, 5780)]