78977220

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{26863}}^1$

素因数の和:26889

約数の個数: 72

約数和(自身を含む): 257249664

約数和(自身を除く): 178272444

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 735, 980, 1470, 2940, 26863, 53726, 80589, 107452, 134315, 161178, 188041, 268630, 322356, 376082, 402945, 537260, 564123, 752164, 805890, 940205, 1128246, 1316287, 1611780, 1880410, 2256492, 2632574, 2820615, 3760820, 3948861, 5265148, 5641230, 6581435, 7897722, 11282460, 13162870, 15795444, 19744305, 26325740, 39488610, 78977220]

約数ペア:

[(1, 78977220), (2, 39488610), (3, 26325740), (4, 19744305), (5, 15795444), (6, 13162870), (7, 11282460), (10, 7897722), (12, 6581435), (14, 5641230), (15, 5265148), (20, 3948861), (21, 3760820), (28, 2820615), (30, 2632574), (35, 2256492), (42, 1880410), (49, 1611780), (60, 1316287), (70, 1128246), (84, 940205), (98, 805890), (105, 752164), (140, 564123), (147, 537260), (196, 402945), (210, 376082), (245, 322356), (294, 268630), (420, 188041), (490, 161178), (588, 134315), (735, 107452), (980, 80589), (1470, 53726), (2940, 26863)]