1001980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{421}}^1$

素因数の和:454

約数の個数: 48

約数和(自身を含む): 2552256

約数和(自身を除く): 1550276

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 34, 35, 68, 70, 85, 119, 140, 170, 238, 340, 421, 476, 595, 842, 1190, 1684, 2105, 2380, 2947, 4210, 5894, 7157, 8420, 11788, 14314, 14735, 28628, 29470, 35785, 50099, 58940, 71570, 100198, 143140, 200396, 250495, 500990, 1001980]

約数ペア:

[(1, 1001980), (2, 500990), (4, 250495), (5, 200396), (7, 143140), (10, 100198), (14, 71570), (17, 58940), (20, 50099), (28, 35785), (34, 29470), (35, 28628), (68, 14735), (70, 14314), (85, 11788), (119, 8420), (140, 7157), (170, 5894), (238, 4210), (340, 2947), (421, 2380), (476, 2105), (595, 1684), (842, 1190)]