20868904

素因数分解:

$2^3\times 7^2\times {\mathrm{139}}^1\times {\mathrm{383}}^1$

素因数の和:542

約数の個数: 48

約数和(自身を含む): 45964800

約数和(自身を除く): 25095896

約数列:

[1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 139, 196, 278, 383, 392, 556, 766, 973, 1112, 1532, 1946, 2681, 3064, 3892, 5362, 6811, 7784, 10724, 13622, 18767, 21448, 27244, 37534, 53237, 54488, 75068, 106474, 150136, 212948, 372659, 425896, 745318, 1490636, 2608613, 2981272, 5217226, 10434452, 20868904]

約数ペア:

[(1, 20868904), (2, 10434452), (4, 5217226), (7, 2981272), (8, 2608613), (14, 1490636), (28, 745318), (49, 425896), (56, 372659), (98, 212948), (139, 150136), (196, 106474), (278, 75068), (383, 54488), (392, 53237), (556, 37534), (766, 27244), (973, 21448), (1112, 18767), (1532, 13622), (1946, 10724), (2681, 7784), (3064, 6811), (3892, 5362)]