19603980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{9901}}^1$

素因数の和:9927

約数の個数: 72

約数和(自身を含む): 64877904

約数和(自身を除く): 45273924

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 9901, 19802, 29703, 39604, 49505, 59406, 89109, 99010, 108911, 118812, 148515, 178218, 198020, 217822, 297030, 326733, 356436, 435644, 445545, 544555, 594060, 653466, 891090, 980199, 1089110, 1306932, 1633665, 1782180, 1960398, 2178220, 3267330, 3920796, 4900995, 6534660, 9801990, 19603980]

約数ペア:

[(1, 19603980), (2, 9801990), (3, 6534660), (4, 4900995), (5, 3920796), (6, 3267330), (9, 2178220), (10, 1960398), (11, 1782180), (12, 1633665), (15, 1306932), (18, 1089110), (20, 980199), (22, 891090), (30, 653466), (33, 594060), (36, 544555), (44, 445545), (45, 435644), (55, 356436), (60, 326733), (66, 297030), (90, 217822), (99, 198020), (110, 178218), (132, 148515), (165, 118812), (180, 108911), (198, 99010), (220, 89109), (330, 59406), (396, 49505), (495, 39604), (660, 29703), (990, 19802), (1980, 9901)]