638211890

素因数分解:

$2^1\times 5^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{28277}}^1$

素因数の和:28382

約数の個数: 32

約数和(自身を含む): 1199213424

約数和(自身を除く): 561001534

約数列:

[1, 2, 5, 10, 37, 61, 74, 122, 185, 305, 370, 610, 2257, 4514, 11285, 22570, 28277, 56554, 141385, 282770, 1046249, 1724897, 2092498, 3449794, 5231245, 8624485, 10462490, 17248970, 63821189, 127642378, 319105945, 638211890]

約数ペア:

[(1, 638211890), (2, 319105945), (5, 127642378), (10, 63821189), (37, 17248970), (61, 10462490), (74, 8624485), (122, 5231245), (185, 3449794), (305, 2092498), (370, 1724897), (610, 1046249), (2257, 282770), (4514, 141385), (11285, 56554), (22570, 28277)]