20804915920

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8389079}}^1$

素因数の和:8389123

約数の個数: 40

約数和(自身を含む): 49931804160

約数和(自身を除く): 29126888240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8389079, 16778158, 33556316, 41945395, 67112632, 83890790, 134225264, 167781580, 260061449, 335563160, 520122898, 671126320, 1040245796, 1300307245, 2080491592, 2600614490, 4160983184, 5201228980, 10402457960, 20804915920]

約数ペア:

[(1, 20804915920), (2, 10402457960), (4, 5201228980), (5, 4160983184), (8, 2600614490), (10, 2080491592), (16, 1300307245), (20, 1040245796), (31, 671126320), (40, 520122898), (62, 335563160), (80, 260061449), (124, 167781580), (155, 134225264), (248, 83890790), (310, 67112632), (496, 41945395), (620, 33556316), (1240, 16778158), (2480, 8389079)]