81117920

素因数分解:

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

素因数の和:748

約数の個数: 96

約数和(自身を含む): 210198240

約数和(自身を除く): 129080320

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 59, 65, 80, 104, 118, 130, 160, 208, 236, 260, 295, 416, 472, 520, 590, 661, 767, 944, 1040, 1180, 1322, 1534, 1888, 2080, 2360, 2644, 3068, 3305, 3835, 4720, 5288, 6136, 6610, 7670, 8593, 9440, 10576, 12272, 13220, 15340, 17186, 21152, 24544, 26440, 30680, 34372, 38999, 42965, 52880, 61360, 68744, 77998, 85930, 105760, 122720, 137488, 155996, 171860, 194995, 274976, 311992, 343720, 389990, 506987, 623984, 687440, 779980, 1013974, 1247968, 1374880, 1559960, 2027948, 2534935, 3119920, 4055896, 5069870, 6239840, 8111792, 10139740, 16223584, 20279480, 40558960, 81117920]

約数ペア:

[(1, 81117920), (2, 40558960), (4, 20279480), (5, 16223584), (8, 10139740), (10, 8111792), (13, 6239840), (16, 5069870), (20, 4055896), (26, 3119920), (32, 2534935), (40, 2027948), (52, 1559960), (59, 1374880), (65, 1247968), (80, 1013974), (104, 779980), (118, 687440), (130, 623984), (160, 506987), (208, 389990), (236, 343720), (260, 311992), (295, 274976), (416, 194995), (472, 171860), (520, 155996), (590, 137488), (661, 122720), (767, 105760), (944, 85930), (1040, 77998), (1180, 68744), (1322, 61360), (1534, 52880), (1888, 42965), (2080, 38999), (2360, 34372), (2644, 30680), (3068, 26440), (3305, 24544), (3835, 21152), (4720, 17186), (5288, 15340), (6136, 13220), (6610, 12272), (7670, 10576), (8593, 9440)]