20742280

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{353}}^1$

素因数の和:490

約数の個数: 64

約数和(自身を含む): 50848560

約数和(自身を除く): 30106280

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 113, 130, 226, 260, 353, 452, 520, 565, 706, 904, 1130, 1412, 1469, 1765, 2260, 2824, 2938, 3530, 4520, 4589, 5876, 7060, 7345, 9178, 11752, 14120, 14690, 18356, 22945, 29380, 36712, 39889, 45890, 58760, 79778, 91780, 159556, 183560, 199445, 319112, 398890, 518557, 797780, 1037114, 1595560, 2074228, 2592785, 4148456, 5185570, 10371140, 20742280]

約数ペア:

[(1, 20742280), (2, 10371140), (4, 5185570), (5, 4148456), (8, 2592785), (10, 2074228), (13, 1595560), (20, 1037114), (26, 797780), (40, 518557), (52, 398890), (65, 319112), (104, 199445), (113, 183560), (130, 159556), (226, 91780), (260, 79778), (353, 58760), (452, 45890), (520, 39889), (565, 36712), (706, 29380), (904, 22945), (1130, 18356), (1412, 14690), (1469, 14120), (1765, 11752), (2260, 9178), (2824, 7345), (2938, 7060), (3530, 5876), (4520, 4589)]