20986868

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{383}}^1$

素因数の和:516

約数の個数: 48

約数和(自身を含む): 44728320

約数和(自身を除く): 23741452

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 103, 133, 206, 266, 383, 412, 532, 721, 766, 1442, 1532, 1957, 2681, 2884, 3914, 5362, 7277, 7828, 10724, 13699, 14554, 27398, 29108, 39449, 50939, 54796, 78898, 101878, 157796, 203756, 276143, 552286, 749531, 1104572, 1499062, 2998124, 5246717, 10493434, 20986868]

約数ペア:

[(1, 20986868), (2, 10493434), (4, 5246717), (7, 2998124), (14, 1499062), (19, 1104572), (28, 749531), (38, 552286), (76, 276143), (103, 203756), (133, 157796), (206, 101878), (266, 78898), (383, 54796), (412, 50939), (532, 39449), (721, 29108), (766, 27398), (1442, 14554), (1532, 13699), (1957, 10724), (2681, 7828), (2884, 7277), (3914, 5362)]