20509720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{6659}}^1$

素因数の和:6688

約数の個数: 64

約数和(自身を含む): 57542400

約数和(自身を除く): 37032680

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 28, 35, 40, 44, 55, 56, 70, 77, 88, 110, 140, 154, 220, 280, 308, 385, 440, 616, 770, 1540, 3080, 6659, 13318, 26636, 33295, 46613, 53272, 66590, 73249, 93226, 133180, 146498, 186452, 233065, 266360, 292996, 366245, 372904, 466130, 512743, 585992, 732490, 932260, 1025486, 1464980, 1864520, 2050972, 2563715, 2929960, 4101944, 5127430, 10254860, 20509720]

約数ペア:

[(1, 20509720), (2, 10254860), (4, 5127430), (5, 4101944), (7, 2929960), (8, 2563715), (10, 2050972), (11, 1864520), (14, 1464980), (20, 1025486), (22, 932260), (28, 732490), (35, 585992), (40, 512743), (44, 466130), (55, 372904), (56, 366245), (70, 292996), (77, 266360), (88, 233065), (110, 186452), (140, 146498), (154, 133180), (220, 93226), (280, 73249), (308, 66590), (385, 53272), (440, 46613), (616, 33295), (770, 26636), (1540, 13318), (3080, 6659)]