19820120

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{8123}}^1$

素因数の和:8195

約数の個数: 32

約数和(自身を含む): 45331920

約数和(自身を除く): 25511800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 8123, 16246, 32492, 40615, 64984, 81230, 162460, 324920, 495503, 991006, 1982012, 2477515, 3964024, 4955030, 9910060, 19820120]

約数ペア:

[(1, 19820120), (2, 9910060), (4, 4955030), (5, 3964024), (8, 2477515), (10, 1982012), (20, 991006), (40, 495503), (61, 324920), (122, 162460), (244, 81230), (305, 64984), (488, 40615), (610, 32492), (1220, 16246), (2440, 8123)]