21279480

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{383}}^1\times {\mathrm{463}}^1$

素因数の和:860

約数の個数: 64

約数和(自身を含む): 64143360

約数和(自身を除く): 42863880

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 383, 463, 766, 926, 1149, 1389, 1532, 1852, 1915, 2298, 2315, 2778, 3064, 3704, 3830, 4596, 4630, 5556, 5745, 6945, 7660, 9192, 9260, 11112, 11490, 13890, 15320, 18520, 22980, 27780, 45960, 55560, 177329, 354658, 531987, 709316, 886645, 1063974, 1418632, 1773290, 2127948, 2659935, 3546580, 4255896, 5319870, 7093160, 10639740, 21279480]

約数ペア:

[(1, 21279480), (2, 10639740), (3, 7093160), (4, 5319870), (5, 4255896), (6, 3546580), (8, 2659935), (10, 2127948), (12, 1773290), (15, 1418632), (20, 1063974), (24, 886645), (30, 709316), (40, 531987), (60, 354658), (120, 177329), (383, 55560), (463, 45960), (766, 27780), (926, 22980), (1149, 18520), (1389, 15320), (1532, 13890), (1852, 11490), (1915, 11112), (2298, 9260), (2315, 9192), (2778, 7660), (3064, 6945), (3704, 5745), (3830, 5556), (4596, 4630)]