640113660

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{8447}}^1$

素因数の和:8883

約数の個数: 72

約数和(自身を含む): 1946520576

約数和(自身を除く): 1306406916

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 421, 842, 1263, 1684, 2105, 2526, 3789, 4210, 5052, 6315, 7578, 8420, 8447, 12630, 15156, 16894, 18945, 25260, 25341, 33788, 37890, 42235, 50682, 75780, 76023, 84470, 101364, 126705, 152046, 168940, 253410, 304092, 380115, 506820, 760230, 1520460, 3556187, 7112374, 10668561, 14224748, 17780935, 21337122, 32005683, 35561870, 42674244, 53342805, 64011366, 71123740, 106685610, 128022732, 160028415, 213371220, 320056830, 640113660]

約数ペア:

[(1, 640113660), (2, 320056830), (3, 213371220), (4, 160028415), (5, 128022732), (6, 106685610), (9, 71123740), (10, 64011366), (12, 53342805), (15, 42674244), (18, 35561870), (20, 32005683), (30, 21337122), (36, 17780935), (45, 14224748), (60, 10668561), (90, 7112374), (180, 3556187), (421, 1520460), (842, 760230), (1263, 506820), (1684, 380115), (2105, 304092), (2526, 253410), (3789, 168940), (4210, 152046), (5052, 126705), (6315, 101364), (7578, 84470), (8420, 76023), (8447, 75780), (12630, 50682), (15156, 42235), (16894, 37890), (18945, 33788), (25260, 25341)]