20565860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2069}}^1$

素因数の和:2156

約数の個数: 48

約数和(自身を含む): 50077440

約数和(自身を除く): 29511580

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 994, 1420, 1988, 2069, 2485, 4138, 4970, 8276, 9940, 10345, 14483, 20690, 28966, 41380, 57932, 72415, 144830, 146899, 289660, 293798, 587596, 734495, 1028293, 1468990, 2056586, 2937980, 4113172, 5141465, 10282930, 20565860]

約数ペア:

[(1, 20565860), (2, 10282930), (4, 5141465), (5, 4113172), (7, 2937980), (10, 2056586), (14, 1468990), (20, 1028293), (28, 734495), (35, 587596), (70, 293798), (71, 289660), (140, 146899), (142, 144830), (284, 72415), (355, 57932), (497, 41380), (710, 28966), (994, 20690), (1420, 14483), (1988, 10345), (2069, 9940), (2485, 8276), (4138, 4970)]