20684972

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{281}}^1$

素因数の和:542

約数の個数: 48

約数和(自身を含む): 45480960

約数和(自身を除く): 24795988

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 77, 154, 239, 281, 308, 478, 562, 956, 1124, 1673, 1967, 2629, 3091, 3346, 3934, 5258, 6182, 6692, 7868, 10516, 12364, 18403, 21637, 36806, 43274, 67159, 73612, 86548, 134318, 268636, 470113, 738749, 940226, 1477498, 1880452, 2954996, 5171243, 10342486, 20684972]

約数ペア:

[(1, 20684972), (2, 10342486), (4, 5171243), (7, 2954996), (11, 1880452), (14, 1477498), (22, 940226), (28, 738749), (44, 470113), (77, 268636), (154, 134318), (239, 86548), (281, 73612), (308, 67159), (478, 43274), (562, 36806), (956, 21637), (1124, 18403), (1673, 12364), (1967, 10516), (2629, 7868), (3091, 6692), (3346, 6182), (3934, 5258)]