20279480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{661}}^1$

素因数の和:744

約数の個数: 64

約数和(自身を含む): 50047200

約数和(自身を除く): 29767720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 59, 65, 104, 118, 130, 236, 260, 295, 472, 520, 590, 661, 767, 1180, 1322, 1534, 2360, 2644, 3068, 3305, 3835, 5288, 6136, 6610, 7670, 8593, 13220, 15340, 17186, 26440, 30680, 34372, 38999, 42965, 68744, 77998, 85930, 155996, 171860, 194995, 311992, 343720, 389990, 506987, 779980, 1013974, 1559960, 2027948, 2534935, 4055896, 5069870, 10139740, 20279480]

約数ペア:

[(1, 20279480), (2, 10139740), (4, 5069870), (5, 4055896), (8, 2534935), (10, 2027948), (13, 1559960), (20, 1013974), (26, 779980), (40, 506987), (52, 389990), (59, 343720), (65, 311992), (104, 194995), (118, 171860), (130, 155996), (236, 85930), (260, 77998), (295, 68744), (472, 42965), (520, 38999), (590, 34372), (661, 30680), (767, 26440), (1180, 17186), (1322, 15340), (1534, 13220), (2360, 8593), (2644, 7670), (3068, 6610), (3305, 6136), (3835, 5288)]