25440040

素因数分解:

$2^3\times 5^1\times {\mathrm{647}}^1\times {\mathrm{983}}^1$

素因数の和:1641

約数の個数: 32

約数和(自身を含む): 57386880

約数和(自身を除く): 31946840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 647, 983, 1294, 1966, 2588, 3235, 3932, 4915, 5176, 6470, 7864, 9830, 12940, 19660, 25880, 39320, 636001, 1272002, 2544004, 3180005, 5088008, 6360010, 12720020, 25440040]

約数ペア:

[(1, 25440040), (2, 12720020), (4, 6360010), (5, 5088008), (8, 3180005), (10, 2544004), (20, 1272002), (40, 636001), (647, 39320), (983, 25880), (1294, 19660), (1966, 12940), (2588, 9830), (3235, 7864), (3932, 6470), (4915, 5176)]