20903932

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 43464960

約数和(自身を除く): 22561028

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 131, 139, 164, 262, 278, 287, 524, 556, 574, 917, 973, 1148, 1834, 1946, 3668, 3892, 5371, 5699, 10742, 11398, 18209, 21484, 22796, 36418, 37597, 39893, 72836, 75194, 79786, 127463, 150388, 159572, 254926, 509852, 746569, 1493138, 2986276, 5225983, 10451966, 20903932]

約数ペア:

[(1, 20903932), (2, 10451966), (4, 5225983), (7, 2986276), (14, 1493138), (28, 746569), (41, 509852), (82, 254926), (131, 159572), (139, 150388), (164, 127463), (262, 79786), (278, 75194), (287, 72836), (524, 39893), (556, 37597), (574, 36418), (917, 22796), (973, 21484), (1148, 18209), (1834, 11398), (1946, 10742), (3668, 5699), (3892, 5371)]