20521680

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{2311}}^1$

素因数の和:2364

約数の個数: 80

約数和(自身を含む): 65364864

約数和(自身を除く): 44843184

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 37, 40, 48, 60, 74, 80, 111, 120, 148, 185, 222, 240, 296, 370, 444, 555, 592, 740, 888, 1110, 1480, 1776, 2220, 2311, 2960, 4440, 4622, 6933, 8880, 9244, 11555, 13866, 18488, 23110, 27732, 34665, 36976, 46220, 55464, 69330, 85507, 92440, 110928, 138660, 171014, 184880, 256521, 277320, 342028, 427535, 513042, 554640, 684056, 855070, 1026084, 1282605, 1368112, 1710140, 2052168, 2565210, 3420280, 4104336, 5130420, 6840560, 10260840, 20521680]

約数ペア:

[(1, 20521680), (2, 10260840), (3, 6840560), (4, 5130420), (5, 4104336), (6, 3420280), (8, 2565210), (10, 2052168), (12, 1710140), (15, 1368112), (16, 1282605), (20, 1026084), (24, 855070), (30, 684056), (37, 554640), (40, 513042), (48, 427535), (60, 342028), (74, 277320), (80, 256521), (111, 184880), (120, 171014), (148, 138660), (185, 110928), (222, 92440), (240, 85507), (296, 69330), (370, 55464), (444, 46220), (555, 36976), (592, 34665), (740, 27732), (888, 23110), (1110, 18488), (1480, 13866), (1776, 11555), (2220, 9244), (2311, 8880), (2960, 6933), (4440, 4622)]