18877840

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:224

約数の個数: 80

約数和(自身を含む): 46425600

約数和(自身を除く): 27547760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 79, 80, 103, 116, 145, 158, 206, 232, 290, 316, 395, 412, 464, 515, 580, 632, 790, 824, 1030, 1160, 1264, 1580, 1648, 2060, 2291, 2320, 2987, 3160, 4120, 4582, 5974, 6320, 8137, 8240, 9164, 11455, 11948, 14935, 16274, 18328, 22910, 23896, 29870, 32548, 36656, 40685, 45820, 47792, 59740, 65096, 81370, 91640, 119480, 130192, 162740, 183280, 235973, 238960, 325480, 471946, 650960, 943892, 1179865, 1887784, 2359730, 3775568, 4719460, 9438920, 18877840]

約数ペア:

[(1, 18877840), (2, 9438920), (4, 4719460), (5, 3775568), (8, 2359730), (10, 1887784), (16, 1179865), (20, 943892), (29, 650960), (40, 471946), (58, 325480), (79, 238960), (80, 235973), (103, 183280), (116, 162740), (145, 130192), (158, 119480), (206, 91640), (232, 81370), (290, 65096), (316, 59740), (395, 47792), (412, 45820), (464, 40685), (515, 36656), (580, 32548), (632, 29870), (790, 23896), (824, 22910), (1030, 18328), (1160, 16274), (1264, 14935), (1580, 11948), (1648, 11455), (2060, 9164), (2291, 8240), (2320, 8137), (2987, 6320), (3160, 5974), (4120, 4582)]