21557835

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{857}}^1$

素因数の和:924

約数の個数: 48

約数和(自身を含む): 41225184

約数和(自身を除く): 19667349

約数列:

[1, 3, 5, 9, 13, 15, 39, 43, 45, 65, 117, 129, 195, 215, 387, 559, 585, 645, 857, 1677, 1935, 2571, 2795, 4285, 5031, 7713, 8385, 11141, 12855, 25155, 33423, 36851, 38565, 55705, 100269, 110553, 167115, 184255, 331659, 479063, 501345, 552765, 1437189, 1658295, 2395315, 4311567, 7185945, 21557835]

約数ペア:

[(1, 21557835), (3, 7185945), (5, 4311567), (9, 2395315), (13, 1658295), (15, 1437189), (39, 552765), (43, 501345), (45, 479063), (65, 331659), (117, 184255), (129, 167115), (195, 110553), (215, 100269), (387, 55705), (559, 38565), (585, 36851), (645, 33423), (857, 25155), (1677, 12855), (1935, 11141), (2571, 8385), (2795, 7713), (4285, 5031)]