19728940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{557}}^1$

素因数の和:607

約数の個数: 96

約数和(自身を含む): 53996544

約数和(自身を除く): 34267604

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 23, 28, 35, 44, 46, 55, 70, 77, 92, 110, 115, 140, 154, 161, 220, 230, 253, 308, 322, 385, 460, 506, 557, 644, 770, 805, 1012, 1114, 1265, 1540, 1610, 1771, 2228, 2530, 2785, 3220, 3542, 3899, 5060, 5570, 6127, 7084, 7798, 8855, 11140, 12254, 12811, 15596, 17710, 19495, 24508, 25622, 30635, 35420, 38990, 42889, 51244, 61270, 64055, 77980, 85778, 89677, 122540, 128110, 140921, 171556, 179354, 214445, 256220, 281842, 358708, 428890, 448385, 563684, 704605, 857780, 896770, 986447, 1409210, 1793540, 1972894, 2818420, 3945788, 4932235, 9864470, 19728940]

約数ペア:

[(1, 19728940), (2, 9864470), (4, 4932235), (5, 3945788), (7, 2818420), (10, 1972894), (11, 1793540), (14, 1409210), (20, 986447), (22, 896770), (23, 857780), (28, 704605), (35, 563684), (44, 448385), (46, 428890), (55, 358708), (70, 281842), (77, 256220), (92, 214445), (110, 179354), (115, 171556), (140, 140921), (154, 128110), (161, 122540), (220, 89677), (230, 85778), (253, 77980), (308, 64055), (322, 61270), (385, 51244), (460, 42889), (506, 38990), (557, 35420), (644, 30635), (770, 25622), (805, 24508), (1012, 19495), (1114, 17710), (1265, 15596), (1540, 12811), (1610, 12254), (1771, 11140), (2228, 8855), (2530, 7798), (2785, 7084), (3220, 6127), (3542, 5570), (3899, 5060)]