20454128

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{541}}^1$

素因数の和:705

約数の個数: 40

約数和(自身を含む): 42341040

約数和(自身を除く): 21886912

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 139, 272, 278, 541, 556, 1082, 1112, 2164, 2224, 2363, 4328, 4726, 8656, 9197, 9452, 18394, 18904, 36788, 37808, 73576, 75199, 147152, 150398, 300796, 601592, 1203184, 1278383, 2556766, 5113532, 10227064, 20454128]

約数ペア:

[(1, 20454128), (2, 10227064), (4, 5113532), (8, 2556766), (16, 1278383), (17, 1203184), (34, 601592), (68, 300796), (136, 150398), (139, 147152), (272, 75199), (278, 73576), (541, 37808), (556, 36788), (1082, 18904), (1112, 18394), (2164, 9452), (2224, 9197), (2363, 8656), (4328, 4726)]