20919418

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:151

約数の個数: 64

約数和(自身を含む): 39191040

約数和(自身を除く): 18271622

約数列:

[1, 2, 13, 17, 19, 26, 34, 38, 47, 53, 94, 106, 221, 247, 323, 442, 494, 611, 646, 689, 799, 893, 901, 1007, 1222, 1378, 1598, 1786, 1802, 2014, 2491, 4199, 4982, 8398, 10387, 11609, 11713, 13091, 15181, 17119, 20774, 23218, 23426, 26182, 30362, 32383, 34238, 42347, 47329, 64766, 84694, 94658, 197353, 222547, 394706, 445094, 550511, 615277, 804593, 1101022, 1230554, 1609186, 10459709, 20919418]

約数ペア:

[(1, 20919418), (2, 10459709), (13, 1609186), (17, 1230554), (19, 1101022), (26, 804593), (34, 615277), (38, 550511), (47, 445094), (53, 394706), (94, 222547), (106, 197353), (221, 94658), (247, 84694), (323, 64766), (442, 47329), (494, 42347), (611, 34238), (646, 32383), (689, 30362), (799, 26182), (893, 23426), (901, 23218), (1007, 20774), (1222, 17119), (1378, 15181), (1598, 13091), (1786, 11713), (1802, 11609), (2014, 10387), (2491, 8398), (4199, 4982)]