20881764

素因数分解:

$2^2\times 3^2\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:365

約数の個数: 72

約数和(自身を含む): 55314168

約数和(自身を除く): 34432404

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 37, 61, 74, 111, 122, 148, 183, 222, 244, 257, 333, 366, 444, 514, 549, 666, 732, 771, 1028, 1098, 1332, 1542, 2196, 2257, 2313, 3084, 4514, 4626, 6771, 9028, 9252, 9509, 13542, 15677, 19018, 20313, 27084, 28527, 31354, 38036, 40626, 47031, 57054, 62708, 81252, 85581, 94062, 114108, 141093, 171162, 188124, 282186, 342324, 564372, 580049, 1160098, 1740147, 2320196, 3480294, 5220441, 6960588, 10440882, 20881764]

約数ペア:

[(1, 20881764), (2, 10440882), (3, 6960588), (4, 5220441), (6, 3480294), (9, 2320196), (12, 1740147), (18, 1160098), (36, 580049), (37, 564372), (61, 342324), (74, 282186), (111, 188124), (122, 171162), (148, 141093), (183, 114108), (222, 94062), (244, 85581), (257, 81252), (333, 62708), (366, 57054), (444, 47031), (514, 40626), (549, 38036), (666, 31354), (732, 28527), (771, 27084), (1028, 20313), (1098, 19018), (1332, 15677), (1542, 13542), (2196, 9509), (2257, 9252), (2313, 9028), (3084, 6771), (4514, 4626)]