638187855

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{29201}}^1$

素因数の和:29287

約数の個数: 32

約数和(自身を含む): 1076502528

約数和(自身を除く): 438314673

約数列:

[1, 3, 5, 15, 31, 47, 93, 141, 155, 235, 465, 705, 1457, 4371, 7285, 21855, 29201, 87603, 146005, 438015, 905231, 1372447, 2715693, 4117341, 4526155, 6862235, 13578465, 20586705, 42545857, 127637571, 212729285, 638187855]

約数ペア:

[(1, 638187855), (3, 212729285), (5, 127637571), (15, 42545857), (31, 20586705), (47, 13578465), (93, 6862235), (141, 4526155), (155, 4117341), (235, 2715693), (465, 1372447), (705, 905231), (1457, 438015), (4371, 146005), (7285, 87603), (21855, 29201)]