20940260

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{509}}^1$

素因数の和:557

約数の個数: 72

約数和(自身を含む): 51279480

約数和(自身を除く): 30339220

約数列:

[1, 2, 4, 5, 10, 11, 17, 20, 22, 34, 44, 55, 68, 85, 110, 121, 170, 187, 220, 242, 340, 374, 484, 509, 605, 748, 935, 1018, 1210, 1870, 2036, 2057, 2420, 2545, 3740, 4114, 5090, 5599, 8228, 8653, 10180, 10285, 11198, 17306, 20570, 22396, 27995, 34612, 41140, 43265, 55990, 61589, 86530, 95183, 111980, 123178, 173060, 190366, 246356, 307945, 380732, 475915, 615890, 951830, 1047013, 1231780, 1903660, 2094026, 4188052, 5235065, 10470130, 20940260]

約数ペア:

[(1, 20940260), (2, 10470130), (4, 5235065), (5, 4188052), (10, 2094026), (11, 1903660), (17, 1231780), (20, 1047013), (22, 951830), (34, 615890), (44, 475915), (55, 380732), (68, 307945), (85, 246356), (110, 190366), (121, 173060), (170, 123178), (187, 111980), (220, 95183), (242, 86530), (340, 61589), (374, 55990), (484, 43265), (509, 41140), (605, 34612), (748, 27995), (935, 22396), (1018, 20570), (1210, 17306), (1870, 11198), (2036, 10285), (2057, 10180), (2420, 8653), (2545, 8228), (3740, 5599), (4114, 5090)]