1994455780

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{409}}^1\times {\mathrm{1553}}^1$

素因数の和:2128

約数の個数: 48

約数和(自身を含む): 4228061040

約数和(自身を除く): 2233605260

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 409, 628, 785, 818, 1553, 1570, 1636, 2045, 3106, 3140, 4090, 6212, 7765, 8180, 15530, 31060, 64213, 128426, 243821, 256852, 321065, 487642, 635177, 642130, 975284, 1219105, 1270354, 1284260, 2438210, 2540708, 3175885, 4876420, 6351770, 12703540, 99722789, 199445578, 398891156, 498613945, 997227890, 1994455780]

約数ペア:

[(1, 1994455780), (2, 997227890), (4, 498613945), (5, 398891156), (10, 199445578), (20, 99722789), (157, 12703540), (314, 6351770), (409, 4876420), (628, 3175885), (785, 2540708), (818, 2438210), (1553, 1284260), (1570, 1270354), (1636, 1219105), (2045, 975284), (3106, 642130), (3140, 635177), (4090, 487642), (6212, 321065), (7765, 256852), (8180, 243821), (15530, 128426), (31060, 64213)]