21512752

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{569}}^1$

素因数の和:733

約数の個数: 40

約数和(自身を含む): 44528400

約数和(自身を除く): 23015648

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 139, 272, 278, 556, 569, 1112, 1138, 2224, 2276, 2363, 4552, 4726, 9104, 9452, 9673, 18904, 19346, 37808, 38692, 77384, 79091, 154768, 158182, 316364, 632728, 1265456, 1344547, 2689094, 5378188, 10756376, 21512752]

約数ペア:

[(1, 21512752), (2, 10756376), (4, 5378188), (8, 2689094), (16, 1344547), (17, 1265456), (34, 632728), (68, 316364), (136, 158182), (139, 154768), (272, 79091), (278, 77384), (556, 38692), (569, 37808), (1112, 19346), (1138, 18904), (2224, 9673), (2276, 9452), (2363, 9104), (4552, 4726)]