20219990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{661}}^1$

素因数の和:717

約数の個数: 64

約数和(自身を含む): 45757440

約数和(自身を除く): 25537450

約数列:

[1, 2, 5, 7, 10, 14, 19, 23, 35, 38, 46, 70, 95, 115, 133, 161, 190, 230, 266, 322, 437, 661, 665, 805, 874, 1322, 1330, 1610, 2185, 3059, 3305, 4370, 4627, 6118, 6610, 9254, 12559, 15203, 15295, 23135, 25118, 30406, 30590, 46270, 62795, 76015, 87913, 106421, 125590, 152030, 175826, 212842, 288857, 439565, 532105, 577714, 879130, 1064210, 1444285, 2021999, 2888570, 4043998, 10109995, 20219990]

約数ペア:

[(1, 20219990), (2, 10109995), (5, 4043998), (7, 2888570), (10, 2021999), (14, 1444285), (19, 1064210), (23, 879130), (35, 577714), (38, 532105), (46, 439565), (70, 288857), (95, 212842), (115, 175826), (133, 152030), (161, 125590), (190, 106421), (230, 87913), (266, 76015), (322, 62795), (437, 46270), (661, 30590), (665, 30406), (805, 25118), (874, 23135), (1322, 15295), (1330, 15203), (1610, 12559), (2185, 9254), (3059, 6610), (3305, 6118), (4370, 4627)]