9815780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1987}}^1$

素因数の和:2028

約数の個数: 48

約数和(自身を含む): 23378880

約数和(自身を除く): 13563100

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 1987, 2470, 3974, 4940, 7948, 9935, 19870, 25831, 37753, 39740, 51662, 75506, 103324, 129155, 151012, 188765, 258310, 377530, 490789, 516620, 755060, 981578, 1963156, 2453945, 4907890, 9815780]

約数ペア:

[(1, 9815780), (2, 4907890), (4, 2453945), (5, 1963156), (10, 981578), (13, 755060), (19, 516620), (20, 490789), (26, 377530), (38, 258310), (52, 188765), (65, 151012), (76, 129155), (95, 103324), (130, 75506), (190, 51662), (247, 39740), (260, 37753), (380, 25831), (494, 19870), (988, 9935), (1235, 7948), (1987, 4940), (2470, 3974)]