318980080

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{128621}}^1$

素因数の和:128665

約数の個数: 40

約数和(自身を含む): 765558144

約数和(自身を除く): 446578064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 128621, 257242, 514484, 643105, 1028968, 1286210, 2057936, 2572420, 3987251, 5144840, 7974502, 10289680, 15949004, 19936255, 31898008, 39872510, 63796016, 79745020, 159490040, 318980080]

約数ペア:

[(1, 318980080), (2, 159490040), (4, 79745020), (5, 63796016), (8, 39872510), (10, 31898008), (16, 19936255), (20, 15949004), (31, 10289680), (40, 7974502), (62, 5144840), (80, 3987251), (124, 2572420), (155, 2057936), (248, 1286210), (310, 1028968), (496, 643105), (620, 514484), (1240, 257242), (2480, 128621)]