20996248

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{191}}^1$

素因数の和:368

約数の個数: 64

約数和(自身を含む): 49029120

約数和(自身を除く): 28032872

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 151, 182, 191, 302, 364, 382, 604, 728, 764, 1057, 1208, 1337, 1528, 1963, 2114, 2483, 2674, 3926, 4228, 4966, 5348, 7852, 8456, 9932, 10696, 13741, 15704, 17381, 19864, 27482, 28841, 34762, 54964, 57682, 69524, 109928, 115364, 139048, 201887, 230728, 374933, 403774, 749866, 807548, 1499732, 1615096, 2624531, 2999464, 5249062, 10498124, 20996248]

約数ペア:

[(1, 20996248), (2, 10498124), (4, 5249062), (7, 2999464), (8, 2624531), (13, 1615096), (14, 1499732), (26, 807548), (28, 749866), (52, 403774), (56, 374933), (91, 230728), (104, 201887), (151, 139048), (182, 115364), (191, 109928), (302, 69524), (364, 57682), (382, 54964), (604, 34762), (728, 28841), (764, 27482), (1057, 19864), (1208, 17381), (1337, 15704), (1528, 13741), (1963, 10696), (2114, 9932), (2483, 8456), (2674, 7852), (3926, 5348), (4228, 4966)]