18912520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{811}}^1$

素因数の和:886

約数の個数: 64

約数和(自身を含む): 47355840

約数和(自身を除く): 28443320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 53, 55, 88, 106, 110, 212, 220, 265, 424, 440, 530, 583, 811, 1060, 1166, 1622, 2120, 2332, 2915, 3244, 4055, 4664, 5830, 6488, 8110, 8921, 11660, 16220, 17842, 23320, 32440, 35684, 42983, 44605, 71368, 85966, 89210, 171932, 178420, 214915, 343864, 356840, 429830, 472813, 859660, 945626, 1719320, 1891252, 2364065, 3782504, 4728130, 9456260, 18912520]

約数ペア:

[(1, 18912520), (2, 9456260), (4, 4728130), (5, 3782504), (8, 2364065), (10, 1891252), (11, 1719320), (20, 945626), (22, 859660), (40, 472813), (44, 429830), (53, 356840), (55, 343864), (88, 214915), (106, 178420), (110, 171932), (212, 89210), (220, 85966), (265, 71368), (424, 44605), (440, 42983), (530, 35684), (583, 32440), (811, 23320), (1060, 17842), (1166, 16220), (1622, 11660), (2120, 8921), (2332, 8110), (2915, 6488), (3244, 5830), (4055, 4664)]