18757420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{337}}^1$

素因数の和:391

約数の個数: 72

約数和(自身を含む): 45313632

約数和(自身を除く): 26556212

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 55, 92, 110, 115, 121, 220, 230, 242, 253, 337, 460, 484, 506, 605, 674, 1012, 1210, 1265, 1348, 1685, 2420, 2530, 2783, 3370, 3707, 5060, 5566, 6740, 7414, 7751, 11132, 13915, 14828, 15502, 18535, 27830, 31004, 37070, 38755, 40777, 55660, 74140, 77510, 81554, 85261, 155020, 163108, 170522, 203885, 341044, 407770, 426305, 815540, 852610, 937871, 1705220, 1875742, 3751484, 4689355, 9378710, 18757420]

約数ペア:

[(1, 18757420), (2, 9378710), (4, 4689355), (5, 3751484), (10, 1875742), (11, 1705220), (20, 937871), (22, 852610), (23, 815540), (44, 426305), (46, 407770), (55, 341044), (92, 203885), (110, 170522), (115, 163108), (121, 155020), (220, 85261), (230, 81554), (242, 77510), (253, 74140), (337, 55660), (460, 40777), (484, 38755), (506, 37070), (605, 31004), (674, 27830), (1012, 18535), (1210, 15502), (1265, 14828), (1348, 13915), (1685, 11132), (2420, 7751), (2530, 7414), (2783, 6740), (3370, 5566), (3707, 5060)]