18688845

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{47}}^1\times {\mathrm{541}}^1$

素因数の和:610

約数の個数: 48

約数和(自身を含む): 35589888

約数和(自身を除く): 16901043

約数列:

[1, 3, 5, 7, 15, 21, 35, 47, 49, 105, 141, 147, 235, 245, 329, 541, 705, 735, 987, 1623, 1645, 2303, 2705, 3787, 4935, 6909, 8115, 11361, 11515, 18935, 25427, 26509, 34545, 56805, 76281, 79527, 127135, 132545, 177989, 381405, 397635, 533967, 889945, 1245923, 2669835, 3737769, 6229615, 18688845]

約数ペア:

[(1, 18688845), (3, 6229615), (5, 3737769), (7, 2669835), (15, 1245923), (21, 889945), (35, 533967), (47, 397635), (49, 381405), (105, 177989), (141, 132545), (147, 127135), (235, 79527), (245, 76281), (329, 56805), (541, 34545), (705, 26509), (735, 25427), (987, 18935), (1623, 11515), (1645, 11361), (2303, 8115), (2705, 6909), (3787, 4935)]