18820984

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{251}}^1$

素因数の和:380

約数の個数: 64

約数和(自身を含む): 44029440

約数和(自身を除く): 25208456

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 103, 104, 182, 206, 251, 364, 412, 502, 721, 728, 824, 1004, 1339, 1442, 1757, 2008, 2678, 2884, 3263, 3514, 5356, 5768, 6526, 7028, 9373, 10712, 13052, 14056, 18746, 22841, 25853, 26104, 37492, 45682, 51706, 74984, 91364, 103412, 180971, 182728, 206824, 336089, 361942, 672178, 723884, 1344356, 1447768, 2352623, 2688712, 4705246, 9410492, 18820984]

約数ペア:

[(1, 18820984), (2, 9410492), (4, 4705246), (7, 2688712), (8, 2352623), (13, 1447768), (14, 1344356), (26, 723884), (28, 672178), (52, 361942), (56, 336089), (91, 206824), (103, 182728), (104, 180971), (182, 103412), (206, 91364), (251, 74984), (364, 51706), (412, 45682), (502, 37492), (721, 26104), (728, 25853), (824, 22841), (1004, 18746), (1339, 14056), (1442, 13052), (1757, 10712), (2008, 9373), (2678, 7028), (2884, 6526), (3263, 5768), (3514, 5356)]