420121940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{21589}}^1$

素因数の和:21744

約数の個数: 48

約数和(自身を含む): 1015593600

約数和(自身を除く): 595471660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 973, 1390, 1946, 2780, 3892, 4865, 9730, 19460, 21589, 43178, 86356, 107945, 151123, 215890, 302246, 431780, 604492, 755615, 1511230, 3000871, 3022460, 6001742, 12003484, 15004355, 21006097, 30008710, 42012194, 60017420, 84024388, 105030485, 210060970, 420121940]

約数ペア:

[(1, 420121940), (2, 210060970), (4, 105030485), (5, 84024388), (7, 60017420), (10, 42012194), (14, 30008710), (20, 21006097), (28, 15004355), (35, 12003484), (70, 6001742), (139, 3022460), (140, 3000871), (278, 1511230), (556, 755615), (695, 604492), (973, 431780), (1390, 302246), (1946, 215890), (2780, 151123), (3892, 107945), (4865, 86356), (9730, 43178), (19460, 21589)]