21661760

素因数分解:

$2^6\times 5^1\times {\mathrm{139}}^1\times {\mathrm{487}}^1$

素因数の和:643

約数の個数: 56

約数和(自身を含む): 52059840

約数和(自身を除く): 30398080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 139, 160, 278, 320, 487, 556, 695, 974, 1112, 1390, 1948, 2224, 2435, 2780, 3896, 4448, 4870, 5560, 7792, 8896, 9740, 11120, 15584, 19480, 22240, 31168, 38960, 44480, 67693, 77920, 135386, 155840, 270772, 338465, 541544, 676930, 1083088, 1353860, 2166176, 2707720, 4332352, 5415440, 10830880, 21661760]

約数ペア:

[(1, 21661760), (2, 10830880), (4, 5415440), (5, 4332352), (8, 2707720), (10, 2166176), (16, 1353860), (20, 1083088), (32, 676930), (40, 541544), (64, 338465), (80, 270772), (139, 155840), (160, 135386), (278, 77920), (320, 67693), (487, 44480), (556, 38960), (695, 31168), (974, 22240), (1112, 19480), (1390, 15584), (1948, 11120), (2224, 9740), (2435, 8896), (2780, 7792), (3896, 5560), (4448, 4870)]