21679912

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{107}}^1$

素因数の和:206

約数の個数: 64

約数和(自身を含む): 45619200

約数和(自身を除く): 23939288

約数列:

[1, 2, 4, 8, 19, 31, 38, 43, 62, 76, 86, 107, 124, 152, 172, 214, 248, 344, 428, 589, 817, 856, 1178, 1333, 1634, 2033, 2356, 2666, 3268, 3317, 4066, 4601, 4712, 5332, 6536, 6634, 8132, 9202, 10664, 13268, 16264, 18404, 25327, 26536, 36808, 50654, 63023, 87419, 101308, 126046, 142631, 174838, 202616, 252092, 285262, 349676, 504184, 570524, 699352, 1141048, 2709989, 5419978, 10839956, 21679912]

約数ペア:

[(1, 21679912), (2, 10839956), (4, 5419978), (8, 2709989), (19, 1141048), (31, 699352), (38, 570524), (43, 504184), (62, 349676), (76, 285262), (86, 252092), (107, 202616), (124, 174838), (152, 142631), (172, 126046), (214, 101308), (248, 87419), (344, 63023), (428, 50654), (589, 36808), (817, 26536), (856, 25327), (1178, 18404), (1333, 16264), (1634, 13268), (2033, 10664), (2356, 9202), (2666, 8132), (3268, 6634), (3317, 6536), (4066, 5332), (4601, 4712)]