28289560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{54403}}^1$

素因数の和:54427

約数の個数: 32

約数和(自身を含む): 68549040

約数和(自身を除く): 40259480

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 54403, 108806, 217612, 272015, 435224, 544030, 707239, 1088060, 1414478, 2176120, 2828956, 3536195, 5657912, 7072390, 14144780, 28289560]

約数ペア:

[(1, 28289560), (2, 14144780), (4, 7072390), (5, 5657912), (8, 3536195), (10, 2828956), (13, 2176120), (20, 1414478), (26, 1088060), (40, 707239), (52, 544030), (65, 435224), (104, 272015), (130, 217612), (260, 108806), (520, 54403)]