18019888

素因数分解:

$2^4\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{499}}^1$

素因数の和:605

約数の個数: 40

約数和(自身を含む): 36518000

約数和(自身を除く): 18498112

約数列:

[1, 2, 4, 8, 16, 37, 61, 74, 122, 148, 244, 296, 488, 499, 592, 976, 998, 1996, 2257, 3992, 4514, 7984, 9028, 18056, 18463, 30439, 36112, 36926, 60878, 73852, 121756, 147704, 243512, 295408, 487024, 1126243, 2252486, 4504972, 9009944, 18019888]

約数ペア:

[(1, 18019888), (2, 9009944), (4, 4504972), (8, 2252486), (16, 1126243), (37, 487024), (61, 295408), (74, 243512), (122, 147704), (148, 121756), (244, 73852), (296, 60878), (488, 36926), (499, 36112), (592, 30439), (976, 18463), (998, 18056), (1996, 9028), (2257, 7984), (3992, 4514)]