21248920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{6899}}^1$

素因数の和:6928

約数の個数: 64

約数和(自身を含む): 59616000

約数和(自身を除く): 38367080

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, 6899, 13798, 27596, 34495, 48293, 55192, 68990, 75889, 96586, 137980, 151778, 193172, 241465, 275960, 303556, 379445, 386344, 482930, 531223, 607112, 758890, 965860, 1062446, 1517780, 1931720, 2124892, 2656115, 3035560, 4249784, 5312230, 10624460, 21248920]

約数ペア:

[(1, 21248920), (2, 10624460), (4, 5312230), (5, 4249784), (7, 3035560), (8, 2656115), (10, 2124892), (11, 1931720), (14, 1517780), (20, 1062446), (22, 965860), (28, 758890), (35, 607112), (40, 531223), (44, 482930), (55, 386344), (56, 379445), (70, 303556), (77, 275960), (88, 241465), (110, 193172), (140, 151778), (154, 137980), (220, 96586), (280, 75889), (308, 68990), (385, 55192), (440, 48293), (616, 34495), (770, 27596), (1540, 13798), (3080, 6899)]