27991280

素因数分解:

$2^4\times 5^1\times {\mathrm{43}}^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:238

約数の個数: 80

約数和(自身を含む): 68090880

約数和(自身を除く): 40099600

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 43, 79, 80, 86, 103, 158, 172, 206, 215, 316, 344, 395, 412, 430, 515, 632, 688, 790, 824, 860, 1030, 1264, 1580, 1648, 1720, 2060, 3160, 3397, 3440, 4120, 4429, 6320, 6794, 8137, 8240, 8858, 13588, 16274, 16985, 17716, 22145, 27176, 32548, 33970, 35432, 40685, 44290, 54352, 65096, 67940, 70864, 81370, 88580, 130192, 135880, 162740, 177160, 271760, 325480, 349891, 354320, 650960, 699782, 1399564, 1749455, 2799128, 3498910, 5598256, 6997820, 13995640, 27991280]

約数ペア:

[(1, 27991280), (2, 13995640), (4, 6997820), (5, 5598256), (8, 3498910), (10, 2799128), (16, 1749455), (20, 1399564), (40, 699782), (43, 650960), (79, 354320), (80, 349891), (86, 325480), (103, 271760), (158, 177160), (172, 162740), (206, 135880), (215, 130192), (316, 88580), (344, 81370), (395, 70864), (412, 67940), (430, 65096), (515, 54352), (632, 44290), (688, 40685), (790, 35432), (824, 33970), (860, 32548), (1030, 27176), (1264, 22145), (1580, 17716), (1648, 16985), (1720, 16274), (2060, 13588), (3160, 8858), (3397, 8240), (3440, 8137), (4120, 6794), (4429, 6320)]