19905028

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1$

素因数の和:157

約数の個数: 96

約数和(自身を含む): 45722880

約数和(自身を除く): 25817852

約数列:

[1, 2, 4, 11, 13, 17, 22, 23, 26, 34, 44, 46, 52, 68, 89, 92, 143, 178, 187, 221, 253, 286, 299, 356, 374, 391, 442, 506, 572, 598, 748, 782, 884, 979, 1012, 1157, 1196, 1513, 1564, 1958, 2047, 2314, 2431, 3026, 3289, 3916, 4094, 4301, 4628, 4862, 5083, 6052, 6578, 8188, 8602, 9724, 10166, 12727, 13156, 16643, 17204, 19669, 20332, 22517, 25454, 26611, 33286, 34799, 39338, 45034, 50908, 53222, 55913, 66572, 69598, 78676, 90068, 106444, 111826, 139196, 216359, 223652, 292721, 382789, 432718, 452387, 585442, 765578, 865436, 904774, 1170884, 1531156, 1809548, 4976257, 9952514, 19905028]

約数ペア:

[(1, 19905028), (2, 9952514), (4, 4976257), (11, 1809548), (13, 1531156), (17, 1170884), (22, 904774), (23, 865436), (26, 765578), (34, 585442), (44, 452387), (46, 432718), (52, 382789), (68, 292721), (89, 223652), (92, 216359), (143, 139196), (178, 111826), (187, 106444), (221, 90068), (253, 78676), (286, 69598), (299, 66572), (356, 55913), (374, 53222), (391, 50908), (442, 45034), (506, 39338), (572, 34799), (598, 33286), (748, 26611), (782, 25454), (884, 22517), (979, 20332), (1012, 19669), (1157, 17204), (1196, 16643), (1513, 13156), (1564, 12727), (1958, 10166), (2047, 9724), (2314, 8602), (2431, 8188), (3026, 6578), (3289, 6052), (3916, 5083), (4094, 4862), (4301, 4628)]