18845528

素因数分解:

$2^3\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{263}}^1$

素因数の和:348

約数の個数: 48

約数和(自身を含む): 39132720

約数和(自身を除く): 20287192

約数列:

[1, 2, 4, 8, 13, 26, 52, 53, 104, 106, 169, 212, 263, 338, 424, 526, 676, 689, 1052, 1352, 1378, 2104, 2756, 3419, 5512, 6838, 8957, 13676, 13939, 17914, 27352, 27878, 35828, 44447, 55756, 71656, 88894, 111512, 177788, 181207, 355576, 362414, 724828, 1449656, 2355691, 4711382, 9422764, 18845528]

約数ペア:

[(1, 18845528), (2, 9422764), (4, 4711382), (8, 2355691), (13, 1449656), (26, 724828), (52, 362414), (53, 355576), (104, 181207), (106, 177788), (169, 111512), (212, 88894), (263, 71656), (338, 55756), (424, 44447), (526, 35828), (676, 27878), (689, 27352), (1052, 17914), (1352, 13939), (1378, 13676), (2104, 8957), (2756, 6838), (3419, 5512)]