19902855

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{109}}^1$

素因数の和:208

約数の個数: 64

約数和(自身を含む): 38522880

約数和(自身を除く): 18620025

約数列:

[1, 3, 5, 7, 15, 21, 35, 37, 47, 105, 109, 111, 141, 185, 235, 259, 327, 329, 545, 555, 705, 763, 777, 987, 1295, 1635, 1645, 1739, 2289, 3815, 3885, 4033, 4935, 5123, 5217, 8695, 11445, 12099, 12173, 15369, 20165, 25615, 26085, 28231, 35861, 36519, 60495, 60865, 76845, 84693, 107583, 141155, 179305, 182595, 189551, 423465, 537915, 568653, 947755, 1326857, 2843265, 3980571, 6634285, 19902855]

約数ペア:

[(1, 19902855), (3, 6634285), (5, 3980571), (7, 2843265), (15, 1326857), (21, 947755), (35, 568653), (37, 537915), (47, 423465), (105, 189551), (109, 182595), (111, 179305), (141, 141155), (185, 107583), (235, 84693), (259, 76845), (327, 60865), (329, 60495), (545, 36519), (555, 35861), (705, 28231), (763, 26085), (777, 25615), (987, 20165), (1295, 15369), (1635, 12173), (1645, 12099), (1739, 11445), (2289, 8695), (3815, 5217), (3885, 5123), (4033, 4935)]