161281540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{199}}^1\times {\mathrm{827}}^1$

素因数の和:1049

約数の個数: 72

約数和(自身を含む): 396446400

約数和(自身を除く): 235164860

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 199, 245, 398, 490, 796, 827, 980, 995, 1393, 1654, 1990, 2786, 3308, 3980, 4135, 5572, 5789, 6965, 8270, 9751, 11578, 13930, 16540, 19502, 23156, 27860, 28945, 39004, 40523, 48755, 57890, 81046, 97510, 115780, 162092, 164573, 195020, 202615, 329146, 405230, 658292, 810460, 822865, 1152011, 1645730, 2304022, 3291460, 4608044, 5760055, 8064077, 11520110, 16128154, 23040220, 32256308, 40320385, 80640770, 161281540]

約数ペア:

[(1, 161281540), (2, 80640770), (4, 40320385), (5, 32256308), (7, 23040220), (10, 16128154), (14, 11520110), (20, 8064077), (28, 5760055), (35, 4608044), (49, 3291460), (70, 2304022), (98, 1645730), (140, 1152011), (196, 822865), (199, 810460), (245, 658292), (398, 405230), (490, 329146), (796, 202615), (827, 195020), (980, 164573), (995, 162092), (1393, 115780), (1654, 97510), (1990, 81046), (2786, 57890), (3308, 48755), (3980, 40523), (4135, 39004), (5572, 28945), (5789, 27860), (6965, 23156), (8270, 19502), (9751, 16540), (11578, 13930)]