19701968

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1$

素因数の和:220

約数の個数: 80

約数和(自身を含む): 45830400

約数和(自身を除く): 26128432

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 44, 52, 79, 88, 104, 109, 143, 158, 176, 208, 218, 286, 316, 436, 572, 632, 869, 872, 1027, 1144, 1199, 1264, 1417, 1738, 1744, 2054, 2288, 2398, 2834, 3476, 4108, 4796, 5668, 6952, 8216, 8611, 9592, 11297, 11336, 13904, 15587, 16432, 17222, 19184, 22594, 22672, 31174, 34444, 45188, 62348, 68888, 90376, 94721, 111943, 124696, 137776, 180752, 189442, 223886, 249392, 378884, 447772, 757768, 895544, 1231373, 1515536, 1791088, 2462746, 4925492, 9850984, 19701968]

約数ペア:

[(1, 19701968), (2, 9850984), (4, 4925492), (8, 2462746), (11, 1791088), (13, 1515536), (16, 1231373), (22, 895544), (26, 757768), (44, 447772), (52, 378884), (79, 249392), (88, 223886), (104, 189442), (109, 180752), (143, 137776), (158, 124696), (176, 111943), (208, 94721), (218, 90376), (286, 68888), (316, 62348), (436, 45188), (572, 34444), (632, 31174), (869, 22672), (872, 22594), (1027, 19184), (1144, 17222), (1199, 16432), (1264, 15587), (1417, 13904), (1738, 11336), (1744, 11297), (2054, 9592), (2288, 8611), (2398, 8216), (2834, 6952), (3476, 5668), (4108, 4796)]