19727840

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^2\times {\mathrm{1019}}^1$

素因数の和:1056

約数の個数: 72

約数和(自身を含む): 51279480

約数和(自身を除く): 31551640

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 80, 88, 110, 121, 160, 176, 220, 242, 352, 440, 484, 605, 880, 968, 1019, 1210, 1760, 1936, 2038, 2420, 3872, 4076, 4840, 5095, 8152, 9680, 10190, 11209, 16304, 19360, 20380, 22418, 32608, 40760, 44836, 56045, 81520, 89672, 112090, 123299, 163040, 179344, 224180, 246598, 358688, 448360, 493196, 616495, 896720, 986392, 1232990, 1793440, 1972784, 2465980, 3945568, 4931960, 9863920, 19727840]

約数ペア:

[(1, 19727840), (2, 9863920), (4, 4931960), (5, 3945568), (8, 2465980), (10, 1972784), (11, 1793440), (16, 1232990), (20, 986392), (22, 896720), (32, 616495), (40, 493196), (44, 448360), (55, 358688), (80, 246598), (88, 224180), (110, 179344), (121, 163040), (160, 123299), (176, 112090), (220, 89672), (242, 81520), (352, 56045), (440, 44836), (484, 40760), (605, 32608), (880, 22418), (968, 20380), (1019, 19360), (1210, 16304), (1760, 11209), (1936, 10190), (2038, 9680), (2420, 8152), (3872, 5095), (4076, 4840)]