25428760

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{461}}^1$

素因数の和:676

約数の個数: 64

約数和(自身を含む): 65862720

約数和(自身を除く): 40433960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 197, 280, 394, 461, 788, 922, 985, 1379, 1576, 1844, 1970, 2305, 2758, 3227, 3688, 3940, 4610, 5516, 6454, 6895, 7880, 9220, 11032, 12908, 13790, 16135, 18440, 25816, 27580, 32270, 55160, 64540, 90817, 129080, 181634, 363268, 454085, 635719, 726536, 908170, 1271438, 1816340, 2542876, 3178595, 3632680, 5085752, 6357190, 12714380, 25428760]

約数ペア:

[(1, 25428760), (2, 12714380), (4, 6357190), (5, 5085752), (7, 3632680), (8, 3178595), (10, 2542876), (14, 1816340), (20, 1271438), (28, 908170), (35, 726536), (40, 635719), (56, 454085), (70, 363268), (140, 181634), (197, 129080), (280, 90817), (394, 64540), (461, 55160), (788, 32270), (922, 27580), (985, 25816), (1379, 18440), (1576, 16135), (1844, 13790), (1970, 12908), (2305, 11032), (2758, 9220), (3227, 7880), (3688, 6895), (3940, 6454), (4610, 5516)]