20642908

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{239}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 42900480

約数和(自身を除く): 22257572

約数列:

[1, 2, 4, 11, 13, 22, 26, 44, 52, 143, 151, 239, 286, 302, 478, 572, 604, 956, 1661, 1963, 2629, 3107, 3322, 3926, 5258, 6214, 6644, 7852, 10516, 12428, 21593, 34177, 36089, 43186, 68354, 72178, 86372, 136708, 144356, 396979, 469157, 793958, 938314, 1587916, 1876628, 5160727, 10321454, 20642908]

約数ペア:

[(1, 20642908), (2, 10321454), (4, 5160727), (11, 1876628), (13, 1587916), (22, 938314), (26, 793958), (44, 469157), (52, 396979), (143, 144356), (151, 136708), (239, 86372), (286, 72178), (302, 68354), (478, 43186), (572, 36089), (604, 34177), (956, 21593), (1661, 12428), (1963, 10516), (2629, 7852), (3107, 6644), (3322, 6214), (3926, 5258)]